There are many different materials used to manufacture oil seals.

Spark plugs play a crucial role in the combustion process of an internal combustion engine. These small but powerful components are responsible for igniting the air-fuel mixture in the engine's cylinders, ultimately powering the vehicle.
Spring seals are the perfect solution when regular seals are unable to produce a leak-proof mating surface. They are the best substitute for sealing applications involving machinery as they are capable of resisting more heat and pressure than other types of seals.
What are bearing isolators?
Figure 9: Housing-bore eccentricity
Innovations in Oil Seal Manufacturing: Advancing Performance and Reliability
Unthinkable in the list of seals are oil seals, which provide a seal against splashing oil. The most important oil seals are used for rotating shafts and valve stem seals. Oil seals are intentionally never completely sealed to lubricate the seals and prevent wear.




Replacing the fuel-pump gasket
M
Note: For seal type codes, see Table 2.
Synthetic Rubber Oil Seals - Styrene Butadiene Rubber oil seals, or just SBR oil seals, offer strong resistance to abrasions and lesions, making them an ideal seal for fast-moving machinery. With the ability to withstand extreme temperatures with its heat-aging qualities, they can be used in outdoor components. They are also seen as more cost-effective oil seals than natural rubber.
Clean all dirt and oil from the housing, and set the new seal in place with its open (spring) side towards the engine.