All About Oil Seals
If you are looking for the highest temperature resistant oil seals, Perfluoelastomer can go up to 600°F. If you are more concerned for low temperature, Chloroprene can go all the way down to 40°F, which is why it is used most commonly for refrigeration. And if FDA applications or medical devices are your primary concern, Butyl , the all petroleum compound, will be your best choice. As you can see, when choosing the right material to work with, you must analyze several other key components to help choose the right one.
Shaft oil seals are used in a wide range of industries, including automotive, industrial, and aerospace
. In automotive applications, they are commonly used in engine crankshafts, camshafts, and differentials, where they help to prevent oil leaks and maintain optimal lubrication levels. In industrial applications, shaft oil seals are used in pumps, compressors, and other rotating equipment to protect bearings and other critical components from damage.shaft oil seal

Type code
With spring Rubber O.D. wall Metal O.D. wall
Use a piece of wood to scrape off all traces of the old gasket from the head and cover. If total removal proves difficult, use a broad screwdriver blade, but take care not to scratch the seating.