What is Rubber Gasket and its Materials

Seals are mechanical seals that prevent leaks between separate substrate sections. Occasionally they are made of metal because they must be strong enough to withstand extreme pressures and wear. However, many gaskets, such as o-rings, can be made of synthetic rubbers or silicone. These thick tires are robust enough to handle the types of pressure and conditions associated with joint applications.

The boards come in different shapes and sizes.
Image credit: Peter Sobelev / Shutterstock.com


Types of rubber used in joints

Many types of rubber are used to make rubber gasket manufacturer, mainly due to the multitude of different environments facing different applications. Some rubbers must withstand both extreme cold and extreme heat, while others must withstand chemicals that can act as corrosive and could damage many types of rubber. This makes heat and cold resistance, weather resistance and lack of absorption a premium for joint rubber, but the properties of resistance, flexibility and friction should not be ruled out.

The following list of materials is not intended to be exhaustive, but rather to represent some of the most common types of rubber used in the production of rubber seals.


Nitrile rubber, or Buna-N, is a general purpose rubber with a good temperature range (-65 to 300 degrees F). It has good wear resistance and will not crack easily.


Ethylene Propylene (EPR) works well with hydraulic fluids that are corrosive and dangerous when exposed to human body skin. Due to its high resistance to corrosive fluids, it is generally suitable for applications that experience a certain amount of contact with other types of liquids.


The fluorocarbon that is often sold under the brand name Viton is another all-purpose rubber that has a higher temperature range than nitrile rubber. It can be used in many different applications, such as oils, fluids and gases, as well as certain types of acids.


The neoprene has a low temperature range and can be used in applications where temperatures drop to -65 degrees F. For this reason, it is often used with refrigerants in refrigeration and air conditioning units. Unfortunately, neoprene sometimes has lead components. It is important to take precautions when handling or using neoprene to prevent human health problems.


Polyurethane is another rubber with a low temperature limit, although it has a worse heat resistance capacity of the upper step than the neoprene. It is used in some of the coldest environments because even when it is cold or frozen it will not become brittle, nor will it break or crack.


Silicone is typically used for extreme temperatures, but it does not work well in applications that require extreme tear resistance or much movement and pressure.


PTFE can withstand very high heat (up to 500 degrees F) while maintaining dielectric strength and chemical inertia. Because it resists all water, it is used in many applications where water can be a problem.

O-rings made of PTFE.
Image credit: Chicago Gasket

Rubber gasket applications

Joints are used in a wide variety of applications in a wide range of environments, so factors such as those listed above must be taken into account. O-rings, which are the most common type of gasket, are made of synthetic rubber and represent a large part of the use of the rubber gasket. However, many other basic gasket seals are made of rubber for commercial and industrial use in pipes, wood and other applications. These joints can work well with other rubber materials, or various types of metal and even wood. Sealant should be incorporated to ensure seal integrity and prevent leakage. Some examples of common sealants are oak, plumbers putty and thread sealing tape.

Summary

This article presents an understanding of the different rubbers used to make joints, their properties and applications. For more information on related services, see our other guides or visit the Thomas Supplier Discovery Platform to locate potential sources of supply or view details about specific products.

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