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Why Sealing Gaskets Matter

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A gasket is a form of seal that bridges the space between two surfaces to prevent leakages. When installed incorrectly, gaskets will fail to function properly. To maintain your rubber gaskets’ optimal performance for an extended time, you must take several steps, one of which is sealing.

Gaskets are a typical tool to enable a better fit while fitting into the application. Once the gasket has been properly installed, this sealant also guards against sliding. In addition, sealing gaskets guards against leaks and debris on machinery.

What Is a Gasket?

Most rubber gaskets are used to seal equipment. Even though most of these don’t need gaskets, it is a frequently utilized product to enable better placement when fitting onto the application.

Gaskets can tolerate great pressure that can be handled by their solid metal design. In industrial settings, gaskets are frequently used to seal fuel tanks, pipes, and boilers. They are also installed in car and truck engines to form a seal between the cylinders and the cylinder head. Finally, ring gaskets are used as seals in offshore oil and gas pipelines.

For industrial sealing devices, a gasket can withstand some of the harshest environments and applications, including the following:

  • Chemical processes
  • Power generation
  • Deep sea and petroleum industries
  • Gas and oil
  • Mining
  • Military equipment
  • Aerospace machinery

How To Choose the Right Material for Your Seal and Gasket

Using unsuitable materials for a project can cause seal or gasket failure, leading to equipment damage, production delays, shortened product life, or even injury. Therefore, evaluating your application’s requirements and specifications is crucial to ensure that your chosen material will match your needs.

Here are some of the major considerations when choosing sealing gaskets:


Extreme temperatures can impact a material’s ability to seal, its maximum permitted stress, and its overall performance. Usually, material selections are more constrained as application temperatures climb. Your choice of material will also be influenced by how long a material is exposed to its maximum temperature.

Environmental Factors

The durability of a gasket can be affected by various external conditions. For example, the success or failure of your seal or gasket depends on the temperature, UV exposure, moisture resistance, chemical resistance, and BSR & NVH reduction (vibration resistance) it will experience during processing.

Industry Standards

Seals and gaskets have different standards depending on your product, business, and location. Industries with specialized material needs include automotive, food service, pharmaceutical, and many more. Therefore, working with a manufacturer knowledgeable about industry best practices and standards is vital.

Material Compression Set

The degree of permanent deformation that a seal or gasket experiences when subjected to pressure or force is known as the compression set of material. Due to gaps, leaks, or application problems, seal or gasket performance degrades over time and with repetitive compression, which decreases its efficacy.

It is crucial to remember that intermittent compression is more significant than constant compression when it comes to material recovery. Therefore, you should collaborate with a reliable partner to help you choose the right material for your application and conduct real-world testing to establish its suitability for your planned use.


A standardized method for determining a material’s hardness or firmness, in the case of foam, is the durometer. The measurement ranges of durometer testers, which range from 0-100, show how much force is required to produce various indentation levels. Higher numbers denote harder materials, while lower numbers denote soft, flexible materials.

A vital component of sealing performance is the durometer. The seal or gasket material must be tough enough to endure the pressure or impact it will experience but soft enough to cover the space between two surfaces without protruding from the joint.

It can take time to choose the right material hardness for your application. Thus, working with an experienced manufacturer will help you select the optimum material for your application while staying within your budget.

Reliable Sealing Services With Arizona Sealing Devices

As an ISO 9001:2015/AS9120B certified company distributing high-end sealing products, Arizona Sealing Devices prioritizes quality above all else! Our staff diligently evaluates each product we offer to ensure that it meets the needs and specifications of our customers.

Since our company’s beginnings in 1989 as an O-ring provider, we have increased the range of sealing products we offer to include caps, gaskets, plugs, and seal kits.

Get to know more about our sealing services and products by calling 480-892-7325. You may also contact us today!

What Are O-Rings?

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O-rings are an essential component in many industrial manufacturing processes. These simple yet effective rubber rings provide a tight seal between two mating surfaces, allowing for the transfer of fluids or gases while preventing leaks. They have been used in aerospace, automotive, and medical applications since their invention by Danish engineer Neils Christensen in 1937.

O-rings offer superior sealing capabilities compared to traditional gaskets. Their versatility and cost-effectiveness make them an ideal choice for applications ranging from fuel lines to oil seals on engines. They can also be manufactured with different materials, making them one of the most widely used components across multiple industries today.

Materials and Types

O-rings aren’t always round; they may come in squares, X-shapes, and more, depending on their intended use. Moreover, multiple fabrication methods are used for O-rings, including extrusion, compression molding, injection molding, transfer molding, and machining.

Depending on the application, O-rings can be made from the following materials:

  • Nitrile rubber
  • Silicone
  • Polyurethane
  • Neoprene
  • Fluorocarbon
  • Other elastomers and more!

Static O-Rings

Static O-rings are used in stationary applications and are usually machined in a groove into the mating surfaces, preventing them from moving under pressure or temperature changes.

Dynamic O-Rings

Dynamic O-rings are designed for applications that must be able to move while maintaining the seal. Examples of dynamic O-rings include piston or shaft seals, which provide a sealing effect against rotating components. The design of these parts is more intricate than static ones due to their movement requirements and additional considerations, such as radial force and torque capabilities.

Common Applications of O-Rings

Most O-rings are used in fluid power applications such as hydraulics and pneumatics. They are also very common in piping systems, machine tools, engines, and other mechanical equipment. Other applications include the following:

Transportation and Automotive Industries

O-rings are ideal for sealing fluids such as motor oil and other liquid fuel systems, brake fluids, antifreeze, and more. Additionally, they can be used in the air intake and cooling systems to prevent leakage of air or coolant.

Medical Industry

O-rings are vital to medical device applications, such as oxygen tanks, fluid delivery systems, respiratory equipment, and more. Due to their resistance to extreme temperatures, chemicals, and gases, they provide a reliable seal even under highly hazardous conditions.


Due to their small size and high strength, O-rings are often used in the electronics industry. They are applied as seals for circuit boards, switches, connectors, and other components to prevent moisture and dust from entering the devices.

Aerospace Industry

O-rings’ ability to withstand extreme temperatures makes them well-suited for various aerospace applications, such as fuel tanks, actuators, landing gear systems, hydraulics, oxygen regulators, cabin pressure control systems, and others.

Food and Beverage

O-rings are ideal for applications that require a tight seal, such as in soft drink dispensers, beer kegs, or chocolate enrober machines. They can also be found in bottle caps, faucets, and other food-related machinery.

Arizona Sealing Devices for High-Quality O-Ring Needs

The variety of applications for O-rings demonstrates their versatility and usefulness across multiple industries. In addition, proper maintenance and care can provide reliable performance over time, making them a cost-effective choice for sealing solutions.

Quality is our top priority here at Arizona Sealing Devices. Our staff meticulously manufactures and calibrates each product we put out to ensure that it is appropriate for the specific use. Thus, you can rely on us to address your needs and deliver only top-notch components!

Contact us to learn more about our range of products and services!

Sealing Device Design Guide

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Seals are critical to the function of a device. For instance, seals prevent sweat and water from entering wearable devices, keeping them free from corrosion, shortage, and failure. Meanwhile, sealing devices maintain parts and components in tip-top shape and reduce the risk of product damage.

When creating a sealing device, the main task is to join two parts so that no thin fluids like water or air can pass through the joint. However, liquids and gasses can press through the narrowest crevices and move in different directions. In addition, even the slightest pressure from these fluids can cause large forces that can distort a component.

Creating a sealing device design could be challenging, but seals don’t often receive proper analysis and attention during the design phase. Since seals control unwanted leakages of liquid and gasses in various components — pumps, valves, pipe fittings, vacuum seals, etc. — failing to utilize the appropriate seal often results in reworking the piece and delays manufacturing and delivery.

This article will dive into the importance of selecting the suitable seal for different applications and the key considerations when designing a sealing device.

Line Identification

Before finding and selecting the appropriate materials for the sealing device, the first step is to identify where the seal will be placed. For an effective seal, engineers must envision a line between the rigid parts that halt the fluid. This will help them see if there are gaps that will prevent the seal from working.

Material Selection

The next step in designing a sealing device is determining the appropriate material for the seal, depending on the specific application or purpose. The first thing to consider when choosing the material is closing force requirements. For this factor, engineers can choose from the following applications:

  • Sponge Cross-Section: This is typically used for applications with low closing force, such as door seals and other consumer-type products.
  • Dense Section: This is ideal for applications in the industrial setting, like bolting two components together or those demanding a great deal of interference between the two surfaces.

Meanwhile, engineers should also examine the environment — temperatures, chemicals, ultraviolet, and ozone pressure — where the sealing device will be applied and how the seal will be attached. The latter involves seals that require compressions, adhesives, or mechanical attachments.

Design Criteria

Once the material has been selected, the process will move forward to the designing phase. Here, the design should incorporate the following considerations:

  • Dimensional requirements
  • Friction
  • Temperature
  • Pressure
  • Chemical compatibility

Compression Application Design

Some seals and gaskets are attached using a compression fit into a channel. This application should ensure a 15% to 25% compression in the sponge section channel to hold the seal in place. On the other hand, a 2% to 10% compression is necessary for dense sections.

Adhesive Attachment Application Design

The attachment surface for adhesive applications should be wider than 1/8” to ensure proper binding. Further, the adhesive placement must be done on a flat surface on the seal and substrate.

Mechanical Seal Attachment Application Design

The seal design for mechanical seal attachment should ensure that it will not interfere with the compression of the seal. Hence, an accommodation must be made for inserting the mechanical attachments like staple, nail, and clip.

Products at Arizona Sealing Devices

If you’re looking for a sealing device that would cater to your designs, we at Arizona Sealing Devices are the right people for the job!

Since 1989, we have been offering O-ring supplies for various industries. Our extensive experience has also allowed us to expand our offerings to military and standard gaskets, sheeting, backup rings, quad rings, oil seals, clamps, cord stock, caps, plugs, and custom molded parts.

Contact us to learn more about our products or speak with qualified professionals to address your needs!

EPDM vs. Buna-N

Arizona Sealing Devices is a leading manufacturer and distributor of O-rings, gaskets, plugs, clamps, cable ties, and other commercial and industrial sealing components. We provide standard and custom molded parts as well as military-certified components. Our company is ISO 9001:2015 and AS9120B certified, dedicated to serving customers with small or large orders of high-quality molded components. We work with a wide variety of thermoplastics, rubbers, and other materials to address the needs of unique commercial, industrial, military, medical, and food applications.

Ethylene propylene diene monomer (EPDM) and nitrile butadiene (Buna-N) are two types of rubber that we use to produce sealing components. Although they look alike, EPDM and Buna-N have specific applications for which they are best suited. We will discuss the differences between EPDM and Buna-N, including their respective properties and applications.

Differences Between EPDM and Buna-N

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While both EPDM and Buna-N rubbers are durable, reliable, and resistant to certain types of conditions, each material has its own strengths that make it a good fit for particular applications. Some of the key differences between the two include:

  • Usable temperature range: Buna-N offers a temperature range of -40 °C to 107 °C for most applications, including dairy and food processing operations. EPDM, on the other hand, has a temperature range between -48 °C and 135 °C, making it more applicable across a greater range of cold and heat settings, such as hot water and steam environments.
  • Chemical resistance: EPDM is resistant to deionized water and acidic, alkaline, and alcohol substances used in common cleaning agents. However, EPDM can be easily damaged by exposure to petroleum-based chemicals. Buna-N offers high resistance to damage from petroleum-based fluids, but it can be damaged by exposure to acids and alkaline chemicals over time.
  • Resistance to environmental damage: EPDM is well-regarded for its excellent resistance to weather, including ozone and UV light exposure. This makes it more resistant to aging, especially in outdoor and water-based applications. Buna-N is less resistant to ozone and generally should not be used in outdoor areas.
  • Physical properties: Buna-N offers good physical properties, but EPDM is resistant to abrasion and offers high tensile strength.


Because of these differences, EPDM is commonly preferred for use cases that require added durability, especially with outdoor elements and extreme temperatures. Buna-N’s properties make it an excellent choice for systems that come into contact with petroleum-based chemicals. Here are more details on the best applications for both materials.


EPDM is strong, durable, and can withstand frequent cleanings. Because it can also withstand weathering and water exposure, it’s an excellent option for seals and components in systems that handle, process, or store water. Some of the most common applications for EPDM components include:

  • Automotive components
  • Auto brake systems
  • Bumpers
  • Conveyor belts
  • Dust covers
  • Electrical components
  • Gaskets
  • HVAC parts
  • Water storage components
  • Weatherstripping


Because Buna-N is a synthetic rubber copolymer, it has a stable structure that resists damage from petroleum-based chemicals. This makes the material an excellent choice for storing or processing petrochemical products. Some of the most common applications of Buna-N are:

  • Fuel handling hoses
  • Grommets
  • Hydraulic fluid seals
  • Hydraulic hoses
  • Mounts for shock and vibration
  • O-rings
  • Oil handling equipment
  • Rollers
  • Transmission fluid seals

High-Performance EPDM and Buna-N Seals From Arizona Sealing Devices

Choosing the right rubber or thermoplastic material for your sealing products is essential for ensuring long-term performance. At Arizona Sealing Devices, we have an extensive inventory of different sealing components constructed from popular polymers that are built to last in commercial, industrial, and military applications. Contact us today to learn more about our manufacturing, distribution, and other capabilities.

Square Rings (Gasket)

Arizona Sealing Devices was founded in 1989 as an O-ring supplier. Today, our wide selection of high-quality products includes square rings, gaskets, seals, plugs, and more. Browse our extensive inventory in our online catalog. We’re committed to helping you find the best sealing solution for your application.

Square O-Rings, Gaskets, and Seals

As a leading distributor of standard and custom gaskets and other sealing solutions, we have a wide range of products to choose from.

  • O-Rings: The traditional round O-ring is versatile and reliable, sealing in any direction with little compressive force. Square O-rings have a square cross-section, which allows for a tighter seal on all surfaces, including uneven or irregular surfaces. The quad O-ring, also called an X-ring, features a four-lobed design to provide twice the sealing surface of a round O-ring.
  • Gaskets: Made of a variety of materials — including felt, silicone, neoprene, and more — gaskets create a mechanical seal between irregular surfaces. They’re trusted in mission-critical applications in the aviation, military, agricultural, and automotive industries. 
  • Seals: Among our many sealing solutions, we offer Viton, a synthetic rubber elastomer that is easily molded into precise shapes ideal for a variety of applications. Viton offers excellent heat, flame, acid, weather, ozone, and oil resistance. 

Applications of Square Ring Seals

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Square-cut O-rings are especially useful for thin sealing areas and when the sealing load force is high. They are used in many industries, and each application takes advantage of different O-ring materials and their unique properties to withstand extreme conditions. Some common industries in which square ring seals are used include:

  • Wastewater: O-rings in wastewater applications must be corrosion- and chemical-resistant to withstand the harsh chemicals and materials to which they are exposed.
  • Food and Beverage: Food and beverage O-rings must be nontoxic, hypoallergenic, bacteria-resistant, chemical-resistant, and temperature-resistant to meet FDA guidelines and keep products safe for consumption.
  • Electronics: Sealing components protect electronics from environmental conditions and electromagnetic and radio frequency interferences.
  • Oil and Gas: Oil and gas applications require chemical-, temperature-, and abrasion-resistant o-rings to ensure safe rig operations.
  • Aviation: O-rings are often used in electrical components and fuel systems due to their ability to withstand high speeds, drastic pressure changes, extreme temperature fluctuations, and fluid exposure.
  • Automotive: Often used in braking systems and engines to prevent leakages and protect components against external elements.
  • Medical: O-rings are imperative for any medical device that operates using valves, pumps, or cylinders. Medical O-rings must comply with FDA standards and be able to withstand extreme temperatures and frequent sanitizing.
  • Industrial: The versatility of o-rings allows them to be used in hydraulic, pneumatic, static, and dynamic industrial processes to keep them functioning efficiently.

Materials Used to Ensure a Protective Seal

Because different materials offer different types of protection, it is important to choose the right material to withstand the specific conditions of your application. The effectiveness of your seal depends upon the material you choose as well as the custom size, shape, and dimensions of your O-ring or gasket. 

  • Buna/nitrile: High tensile strength, corrosion- and abrasion-resistant, one of the most common material choices for O-rings
  • AFLAS®: Temperature and chemical resistant, common in oil, gas, aerospace, and industrial applications
  • Butyl: Low permeability, excellent for vacuum sealing
  • Ethylene propylene: Similar to butyl with better ozone and chemical resistance
  • Fluorocarbon (Viton®): Common in high-temperature, high-exposure applications like engines and fuel handling systems, one of the best overall material choices available
  • Fluorosilicone: Fuel resistant, temperature stable, common for aerospace fueling and static sealing
  • Hydrogenated nitrile: Oil-resistant, corrosion-resistant, stronger than standard nitrile
  • Silicone rubber: Temperature-resistant, medical-grade silicone is available, common for static sealing in extreme temperatures 
  • Neoprene: Chemical-resistant, temperature-resistant, high strength, common in refrigerator sealing
  • Cast polyurethane: Abrasion-resistant, common in high-wear applications
  • Millable polyurethane: Similar to cast polyurethane with lower tensile strength 
  • Kalrez®: Extremely chemical-resistant, common in oil and gas, chemical processing, and paint applications
  • Polytetrafluoroethylene (PTFE): Chemical-resistant, temperature-resistant, requires care in installation because it has poor elastic memory at room temperature

With our range of materials and custom solutions, Arizona Sealing Devices has become a trusted distributor of O-ring kits and solutions, including vulcanized and spliced O-rings. No matter your industry or application, we can help you find the ideal sealing solution. Contact us to learn more or request a quote today.

Silicone O-Rings

At Arizona Sealing Devices, we offer a wide selection of O-rings with different cross-sections, sizes, and styles to suit a range of applications. With so many options available, we are here to help you determine the best material for your application.

Silicone is a superior material for sealing devices like O-rings. It is ideal for static sealing applications in high-temperature environments and has exceptional flexibility and resistance to fatigue. Silicone is exceptionally durable and can resist environmental factors like UV rays, oxygen, and ozone exposure. The unique properties of silicone can also be adjusted or enhanced to deliver improved performance when necessary.

What Is a Silicone O-Ring?

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Made from elastomers, O-rings are molded into a ring shape and bear a circular cross-section. Depending on the application, O-rings can be customized with unique cross-sections such as L- or T-shapes. They can also come in a cord-like solution made of plastic or similar materials. The cord can be cut to length and connected at both ends for a custom fit.  These versatile components are used in many static and dynamic applications to seal liquids and gases. Silicone is an ideal material for O-rings, offering various characteristics to improve performance, including:

  • Fungal growth resistance
  • UV, oxygen, and ozone resistance
  • Withstands extreme temperatures
  • Weather resistance
  • Withstands oil and grease from plant or animal sources
  • Electrically insulating
  • Flexible
  • Resists compression

Silicone can withstand temperatures between -75° and 450° F and can be formulated to meet several requirements, including compliance with FDA, Canada AG, 3-A, USDA, and USP Class VI standards. Silicone O-rings can have a hardness between 30 and 80 shore A Durometers.

How Silicone O-Rings Work

Silicone O-rings are activated by pressure to form a seal. They can effectively seal under high pressures and begin to deform as pressure is applied, pressing the silicone ring against the gland walls or seal joints. The seal provides a mechanical barrier to block fluids from entering the seal when pressurized.

Silicone Components & Properties

The term silicone describes a family of polymers made from synthetic compounds consisting of repeating units of siloxane or polysiloxane. Silicone rubber’s properties make it a generally non-reactive and stable material, allowing it to resist a range of harsh conditions. Silicone does not become brittle at low temperatures and can withstand high temperatures. It can perform in demanding applications, and its properties make it ideal for medical devices, electronics, and food storage applications.

Silicone O-Rings From Arizona Sealing Devices

Silicone is an ideal material for sealing devices like O-rings. The material resists a wide range of environmental factors. It is flexible, insulating, and ideal for extreme temperatures, making it suitable for many different industries and applications. Silicone grades can also be safe for medical and food uses and are recognized by organizations like the FDA and USDA.

At Arizona Sealing Devices, we offer silicone O-rings in a range of sizes and styles. Our sealing experts can help you find the ideal sealing solution for your application and have experience working with medical, transportation, electronics, oil and gas, chemical processing, water systems, food production, and various other industries. Our goal is to fully satisfy your needs with on-time delivery, affordable products of the highest quality, and exceptional customer service. Contact us to learn more about our silicone O-rings today.

Vulcanized O-Rings

An O-ring is a type of mechanical gasket used primarily in static applications to provide reliable sealing. Vulcanizing an O-ring makes it impermeable by liquids and gases, further extending its potential list of applications. At Arizona Sealing Devices, we carefully consider user requirements and application details to identify the ideal sealing solution for every client. To browse our solutions, please view AZ Seal’s catalog.

Overview of Vulcanized O-Rings

Generally speaking, vulcanized O-rings provide an ideal selection for static sealing. This is especially true in applications unsuitable for molded O-rings, such as those with oversized or non-standard measurements. Vulcanized O-rings are also viable when only a few pieces are needed, or when a customer needs an O-ring as quickly as possible and cannot wait the standard lead time for molded production.

When selecting a vulcanized O-ring for your next job, there are a few qualities to consider. These include the type of rubber used, the color, the durometer, the cross-section, and the cord thickness. Common materials used to make vulcanized O-rings include:

  • Viton®
  • Buna-N
  • Silicone
  • Polyurethane
  • Neoprene

The cut length of a vulcanized O-ring is calculated based on the desired diameter. There are two different cut angles to choose from:

  • The butt cut is a default 90-degree cut, where the cord gets cut straight from top to bottom on the ring itself.
  • A bevel cut, also known as a skive cut, occurs at a 45-degree angle. This cut ensures that more of the material’s surface area remains in contact at the joint to provide a stronger seal.

Advantages and Applications of Vulcanized O-Rings

Overview of Vulcanized O-Rings

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All told, vulcanized O-rings offer a wide range of benefits. Some of these benefits may include:

  • Ability to accommodate profiles too large for molding
  • Custom sealing
  • High bond integrity
  • Strong and nearly undetectable joints
  • Short production lead times
  • No tooling required

Vulcanized O-rings are also quite versatile. These sealing solutions see frequent use in electronics, aerospace, healthcare, construction, transportation, food processing, power generation, and more.

FAQs on Vulcanized O-Rings

Are vulcanized O-rings right for my application?

Vulcanized O-rings can be used in any situation where a flange or lid must seal. The application itself doesn’t need to be round. If there are moving parts around the O-ring, then a vulcanized O-ring would not be an ideal solution.

How do you inspect a vulcanized joint?

First, locate the splice joint on the vulcanized O-ring. Using your fingers, give it a slight twist in either direction. Do so gently, or the O-ring may break. Also avoid bending the O-ring at the joint to avoid breakage. Provided that the vulcanized O-ring passes this “twist and tug” test, it is safe for installation or continued use.

Vulcanized O-Rings From Arizona Sealing Devices

Arizona Sealing Devices can provide the sealing solutions you need. Whether you’re looking for vulcanized O-rings, spliced O-rings, or another gasket or sealing solution, we will provide what you need as quickly and efficiently as possible.

To find out more information about vulcanized O-rings, please contact Arizona Sealing Devices today.

Viton O-Rings and Sealing Devices Guide

Viton is a versatile, inert alternative material for O-rings, gaskets, and other sealing components. The material is well-regarded for its resistance to chemical damage and its stability in high-temperature and high-pressure environments. Available formulations of Viton offer varying degrees of hardness, enabling its use in products that meet food-grade or medical-grade standards, as well as compounds that can withstand explosive decompression. This versatility makes Viton an ideal choice for fabricating commercial and industrial O-rings that offer long-term reliability in extreme conditions.

Viton Properties

black o rings on black backgroundViton is a synthetic rubber elastomer that can be easily molded or extruded into precise shapes and forms for a wide variety of sealing applications. It typically comes in standard brown and black colors. The material has a hardness range of 50-95 on the durometer hardness scale, with a typical range of 70-75 Shore A. Viton is also inert and retains its properties at temperatures ranging from -20°F to 400°F.

Along with these core characteristics, Viton also resists physical and chemical damage and features excellent tensile strength, ultimately improving its lifespan. It also offers good-to-excellent tensile strength due to its chemical makeup and the high density of the material. Viton’s density is around 1800 kg/m3, compared to other popular rubbers that typically range from 1010 to 1520 kg/m3.

Viton Sealing Device Compatibility

As with all sealants, it’s important to select a material that balances with any extreme environmental factors, harsh chemicals, and other relevant application factors. Viton offers the following resistances:

Physical Properties

  • Abrasion resistance: Good
  • Dynamic resistance: Good-to-excellent
  • Set resistance: Good-to-excellent
  • Tear resistance: Fair-to-good
  • Electrical properties: Fair

Chemical Properties

  • Acid resistance: Excellent
  • General chemical resistance: Good
  • Impermeability: Good
  • Oil resistance: Excellent

Environmental Properties

  • Ozone resistance: Excellent
  • Weather resistance: Excellent
  • Water steam resistance: Fair-to-good

Temperature Properties

  • Cold resistance: Fair
  • Heat resistance: Excellent
  • Flame resistance: Excellent

Viton Sealing Device Applications

Viton O-rings, gaskets, and other sealing devices can be used in a wide range of industrial and commercial applications. These include applications with unique environmental factors, such as:

Viton Sealing Device Applications
  • Vacuumed environments: Viton withstands high pressures and explosive decompression forces, making it ideal for use in many automotive and aerospace systems.
  • Contact with most acids and chemicals: While Viton isn’t suitable for use with acetone and some organic acids, it can withstand solvents, petroleum-based products, and more. Viton gaskets are frequently used in chemical processing centers and pharmaceutical manufacturing plants. It also handles contact with halogenated hydrocarbons, oil, silicone oil, petroleum fuels, and grease for seals in automotive vehicles, aeronautics equipment, and industrial equipment systems.
  • Di-ester lubricants. Viton may be used with di-ester lubricants, which allows Viton O-rings and seals to function well in high-performance systems that require lubrication.
  • Vulcanized. Viton is common material for vulcanized or spliced o-rings. These are ideal for static sealing and are advantageous in this application for molded o-rings which tend to have non-standard measurements.

Some specific applications for Viton O-rings and seals include:

  • Pneumatic seals
  • Bearing isolators that create a barrier against lubricant leaks and contamination
  • Non-contact labyrinth and clearance seals
  • Axial static seals

Choose Viton Sealing Devices From Arizona Sealing Devices

Arizona Sealing Devices supplies high-quality O-rings, gaskets, and sealing solutions made from Viton, nitrile, fluorocarbons, and more. Choosing the proper material is crucial for O-rings and gaskets, especially if they operate in extreme environments or zero-failure applications. We help our customers through every stage of the material selection and manufacturing process.

We are an ISO 9001:2015/AS9120B-certified distributor and have been a leading O-ring supplier since 1989. Contact us today to learn more about our services and our commitment to excellent customer service. You may also browse our catalog to view our O-ring and sealing products.

Silicone O-Rings and Sealing Devices Guide

three colored silicone o rings in a rowSilicone is an elastomer that remains stable, flexible, and non-reactive in extreme conditions, making it ideal for seals, gaskets, and O-rings. O-rings are molded products placed between two mechanical parts to create a tight seal for preventing fluid or gas leakage and keeping out contaminants. Choosing a silicone O-ring provides greater flexibility and performance for a wide variety of applications. With a range of properties and compositions available, you can easily customize your silicone O-rings for any implementation. This could include vulcanized or spliced o-rings as well.

Silicone Properties

Silicone has an extensive range of uses due to its ability to withstand temperature extremes from -58° F to +450° F. Even in very low temperatures where many materials become brittle, silicone remains flexible. Silicone O-rings are extremely clean and do not retain or relay odors or taste, making them highly sought after for food, medical, and semiconductor applications. Some of the other useful properties of silicone include:

  • Resistant to fungal growth
  • Stands up well to hot air, UV, and ozone exposure
  • Withstands weathering
  • Resists damage from engine, transmission, animal, and vegetable oils and fats
  • Compounding can impart qualities of electrical resistance, conductivity, or flame retardancy
  • Possesses a hardness range of 30 to 80 durometer Shore A, with a standard hardness of 70 durometer Shore A
  • Can be compounded to meet FDA, USDA, MIL-STD-413C, MIL-STD-105E, and MIL-I-45208A specifications
Silicone O-Ring Compatability

Silicone O-Ring Compatibility

As with all materials, silicone O-rings have characteristics that are more ideal for some uses and conditions than others. They are best categorized as follows:

  • Recommended Applications: Silicone O-rings are recommended for applications requiring good electrical properties and resistance to heat, cold, ozone, set, weather, acid, chemicals, oil, water steam, and flame.
  • Less Suitable Applications: Silicone O-rings are not recommended for applications that require high levels of tensile strength, impermeability, and significant abrasion, tear, or dynamic resistance.
Silicone O Ring Compatability

Silicone O-Ring Applications

The properties of silicone O-rings allow them to be used across many industries and applications, including but not limited to:

  • Automotive. Used to seal fluids, lubricants, and coolant in fuel and brake systems, engines and transmission components, and automotive air conditioning systems
  • Aviation and defense. Used for sealing applications in aircraft, helicopters, gun systems, and ships
  • Construction and agriculture. Used in heavy-duty equipment and hardware
  • Electronics. Used to seal away from dust and other contaminants that could damage delicate electronic components
  • Food and beverage. Prevents cross-contamination in food and beverage processing equipment and utensils
  • Medical devices. Used in pumps, syringes, filtration devices, and connectors
  • Pharmaceutical. Used in drug production applications and miniature components for laboratory and analytical equipment
  • Semiconductor. Used in fabricating process equipment and integrated circuits
  • Utilities and HVAC. Used for sealing in heating, cooling, sprinkler, drinking water, and compressed air systems  
Silicone O Ring Compatability

Qualified Sealing Experts

When it comes to choosing the right O-ring for your application, material selection is critical. Arizona Sealing Devices has over 30 years of experience in supplying O-rings and other sealing solutions such as caps, plugs, gaskets, and kits in a wide variety of materials. Our talented and highly experienced team extensively researches each product so they can recommend the ideal solution and answer any questions you have about our materials and products. 

We are committed to meeting or exceeding customer expectations in quality, selection, functionality, and customer service. For more information on our inventory, please see our product catalog, or contact us today with any questions.

Buna O-Rings and Gaskets

Buna, otherwise known as Nitrile, Buna-N or NBR, is an incredibly versatile synthetic rubber. The unique properties of this material make Buna an ideal material for O-rings, vulcanized or spliced O-rings, gaskets, and other sealing applications for various industries.

Properties of Buna

black o rings on black backgroundBuna offers many unique properties; making it the sealing industry’s most commonly used material. It is a durable, versatile elastomer that’s typically black in color and resistant to various chemicals, including fuel, oil, diluted acids, alkaline, mineral, vegetable oils, and more. Buna is resistant to abrasion, has a low compression set, and has a high tensile strength ranging from 200 to 3000 psi with 300% elongation at break.

Buna is composed of the copolymer acrylonitrile and butadiene and can be formulated to withstand temperatures ranging from -85°F to 275°F. Its hardness durometer ranges from 40-90 and has a hardness rating of 70 Shore A. These features make Buna O-rings and gaskets commonly found in low temperature military equipment and off-road equipment. 

Buna Sealing Device Compatibility

Buna Sealing Device Applications

To determine if Buna is a right O-ring and gasket material for your intended application, it is important to know its compatibility with different chemicals and environments. Buna’s compatibility levels are as follows:

  • Good to excellent. Oil resistance, dynamic resistance, set resistance, tensile strength
  • Good. Abrasion resistance, cold resistance, heat resistance, impermeability
  • Fair to good. Chemical resistance, water steam resistance
  • Fair. Acid resistance, electrical properties, tear resistance, weather resistance
  • Poor. Flame resistance, ozone resistance 

Buna Sealing Device Applications

Buna’s unique properties and features make it the ideal material for sealing devices in many applications across a wide range of industries, including military, medical, automotive, and aerospace. Some common applications for Buna sealing devices include:

  • Fuel tanks
  • Engines
  • Gear boxes
  • Pneumatics
  • Water/hydraulics
  • Military equipment
  • General aerospace assemblies

Buna’s strong chemical resistance makes it suitable for applications where ordinary rubber cannot be used due to its reactivity with fuels and oils. 

Buna O-Rings, Gaskets, and Other Sealing Devices from AZ Seal

Crafting your O-rings, gaskets, and other sealing devices from the correct material ensures that your equipment’s critical components are safe from damage caused by chemicals and extreme environments. Buna is a highly resistant and versatile synthetic rubber that offers many advantages over ordinary rubbers, making it the most commonly used sealing material for several applications across numerous industries. 

AZ Seal is an ideal supplier of sealing device solutions using Buna as well as a wide variety of other materials to ensure that you have the best possible O-rings, gaskets, and other sealing devices for your specific application. To learn more about our products or to get started on your sealing solution, browse our catalog or contact our experts today.