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custom gaskets


Because gaskets are generally low cost and appear to be simple, the criticality of their role in a device is often overlooked. They usually don’t garner much attention until there is a problem with an application or if there are high maintenance costs to service the gasket or related part. A solid understanding of the application parameters will enable the gasket designer to optimize the gasket to ensure a robust seal or optimal long-term performance. Every gasket application and material is unique but there are common elements that must be addressed to optimize the understanding of what the gasket is up against in the application.

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What is a Gasket?

A gasket is a mechanical seal that fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. Gaskets compensate for "less-than-perfect" mating surfaces. 

Gasket Specs


Temperature can alter the characteristics of the gasket such as the sealing properties, compression set, and maximum allowable stress even if all of the mechanical elements of the joint are properly installed. It is important to take into consideration both internal and external temperatures. Determining the temperature range of the application is essential in the proper selection of a gasket.


The media is the fluid or gas to which the gasket will be exposed. For example, gas may be more difficult to seal than most fluids. Chemical resistance of the gasket material is important because, without it, the other properties of the gasket are irrelevant. It is also important to keep in mind the effect temperature has on chemical resistance. Temperature causes many fluids to become more aggressive. Therefore, a fluid that can be sealed at ambient temperature, may adversely affect the gasket at a higher temperature.


All gaskets require pressure and compression to form a reliable seal. It is important to understand the pressure the gasket will face from a well-connected flange, as well as the internal and external pressure it will be exposed to. Further, it is important to know whether there will be equal pressure applied to the gasket, or whether there could be rotational pressure as this can impact material selection.

There are other factors that can impact material selection related to a gasket.  

UV/Environment – Prolonged exposure to sun or UV can negatively impact many materials, while others are made to withstand this.

Electrical requirements – whether it be electrical insulation or EMI (electromagnetic interference), there are materials that are specifically designed to meet a variety of electrical requirements.

Food or potable water – if gaskets are being used around food or water, they typically require FDA or NSF certification for this use.

Certifications – certain industries require material to meet established specifications.  Examples include MIL-spec (military), AMS (aerospace), UL (flame resistance

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