O-rings

At Wyatt Seal, we offer a vast inventory of O-rings in various sizes and materials. However, sometimes our customers have specific projects that standard O-ring options cannot fully accommodate. To best serve our customers in this situation, we offer custom O-ring solutions to meet all of our customers’ particular sealing needs. 

O-rings are low-cost and reliable circular seals that prevent fluids from leaking. O-rings, known for their durability, are effective against liquid and gas leaks. Their efficacy and versatility make them the most commonly chosen seal in the world. 

O-rings are circular seals typically placed in a groove between two modules in a highly pressurized environment. The O-ring’s circular cross-section prevents it from warping under pressure. 

When considering an O-ring, engineers must examine the desired function. O-rings are available in a range of sizes and materials. An O-ring must be made of the correct material and the correct size to be effective. 

At Wyatt Seal, we offer a vast inventory of O-rings in various sizes and materials. However, sometimes our customers have specific projects that standard O-ring options cannot fully accommodate. To best serve our customers in this situation, we offer custom O-ring solutions to meet all of our customers’ particular sealing needs. 

What are Custom O-Rings?

Custom O-rings are O-rings that are designed to meet the specific needs of your project and industry. During the development process of our custom O-rings, we consider if the custom design requires reworking an existing O-ring to function better for the customer or if it requires a fully new design. 

Our custom O-rings design process is distinctive because we stay focused on the problem that the O-ring will solve, assessing every factor of the project and the project’s conditions.  As a custom O-ring manufacturer, we ask our customers to answer questions about the conditions under which the O-ring will perform.

O-rings vary widely depending on the industry and project use, so our custom O-rings account for the exact equipment conditions, including the temperature range, fluid/ media type, pressure, and speed. 

Types of Custom O-Rings  

As a custom O-ring manufacturer, we are proud to offer a range of material options for your custom O-ring. Our popular types of O-rings include:

Neoprene/ Chloroprene O-Rings

Neoprene O-rings perform well when in contact with oils and generally have good ozone, aging, and chemical resistance. These O-rings function well over a wide temperature range. 

Silicone O-Rings

Silicone O-rings are good insulating options and offer ozone and weather resistance benefits.  These O-rings feature physiologically neutral properties and are ideal for consumer product and life science markets.  

Buna-N /Nitrile O-Rings 

Nitrile O-rings with a high percentage of acrylonitrile offer high resistance to fuel and oil. These custom O-rings provide a more resistant alternative to other elastomers, making them ideal for the fuel and energy markets. 

Fluorosilicone O-Rings 

Fluorosilicone O-rings are a silicone hybrid with high fuel and mineral oil resistance. These O-rings function well with a high-temperature range and are optimal for the fuel market.

Fluorocarbon/Viton O-Rings

Fluorocarbon O-rings have excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics, and many organic solvents and chemicals. This material is popular in many industries because of its versatility and durability. 

Ethylene-Propylene Diene Monomer (EPDM) O-Rings 

EPDM O-rings are made from a rubber polymer and are highly resistant to heat, steam, water, and oxygenated solvents. They are often used with hydraulic braking systems and with other hydraulic fluids. 

Polytetrafluoroethylene (PTFE) O-Rings

PTFE O-rings are known for their high resistance to heat and most chemicals, including acids, bases, and oils. These O-rings are often used when other materials cannot endure harsh chemical conditions. 

Aflas O-Rings

Aflas O-rings are created with a partially fluorinated elastomeric polymer with high chemical resistance. These O-rings offer high heat and steam resistance and are commonly used in the fuel and oil industries. 

Customizing O-Rings

We offer the ability to customize our O-rings based on various factors and materials. Our customers can choose from the previously detailed list of materials, and we also consider other necessary factors, such as: 

Temperature

The correct custom O-ring is designed to withstand quick temperature changes and consistent periods of high and low temperatures. The best way to ensure that your custom O-ring will adequately meet your needs is to take several temperature measurements at the desired O-ring placement. You can find more information about the factors in O-ring temperatures here. 

Shore Hardness 

Shore hardness refers to the hardness of the chosen material for your O-ring. The hardness is measured with a durometer on a scale from 0-100. The shore hardness of your custom O-ring corresponds to the project needs, with high-pressure liquid or gas uses requiring a harder material.

Operating Pressure

Operating pressure references the amount of pressure an O-ring can accommodate before it warps or breaks. O-rings are typically designed to withstand 1500 psi of pressure. A custom O-ring is an excellent option if your project requires an O-ring that can accommodate higher pressures. 

Stretch

O-rings are pliable components that must fit snugly into grooves, which means they are stretched to an extent during installation. Stretching is inevitable in the process, but the extent of stretch must remain within a recommended limit of one to five percent. If your O-ring’s stretch exceeds five percent, a custom O-ring option will better meet your needs. 

Custom O-Ring Applications 

O-rings are used in equipment across various industries, and custom O-rings can provide even more possibilities. Custom O-rings are typically used in engines, pumps, and chemical processing for a range of markets. Our custom O-rings can benefit industries, including: 


Wyatt Seal has a recorded history of creating innovative and reliable custom O-ring designs for various industries and customers. Our thorough design process ensures that your custom O-rings are ideally suited for your project’s specific conditions. If you are ready to start the conversation about your custom O-ring needs, reach out to us today!