For designing the custom rubber seals, it required for you to follow the three different steps as follows.:
* First there is a need for you to understand the needs for the molded rubber gaskets. 
*  It is used for determining out the proper level of compressive forces. Usually they would be compressed out between the two different mating components. 
*  There is also a need for you to understand about the environment for selecting out the correct materials. Usually one can manufacture the custom rubber gaskets and its seals for the heavy equipment, automotive, alternative energy and the medical industries. And the rubber gaskets act as a tightly sealing product that would prevent the leakages through filling out the space while doing the compression. 

When you make a search related to the rubber gasket you can start finding out a lot of different types of automotive seals and gaskets are available as like:
* Cooling system seals that are suitable for the fixing and sealing that matches the components and pipe that joint to inhibit the fluid leakages. 
* The differential seals and gaskets would reduce out the risk of the dirt and the other contaminants which would cause the damage that occurs in the transmission components that is used for maintaining the positioning of gear oil. 
* The engine gaskets and seals would ensure out that the oil, fluids and the coolants do not leak out into or out the internal combustion engine. 
* The fuel supply gasket would produce out the strong steal between the two static surfaces for maintaining the appropriate pressure. 
* The transmission seals and gaskets it provides the pressure tight connection between the automobiles transmission components. As like the internal gaskets that can be used for preventing from leaks and servos. The other one is the external gaskets that are used for preventing the fluids from leaking outside.