use of sealants
Nitrile Butadiene Rubber (NBR, nitrile)
3. Lubricate the Oil Seal
Purpose of an Oil Seal
Because of the higher temperature resistance of FKM, this material is also chosen for applications where higher speeds play a role, which raise the temperature at the sealing lip considerably. Usually, using FKM will result in a longer life than using NBR. This compensates the higher price of FKM compared to NBR, as an FKM does not have to be replaced as frequently. The low temperature resistance of standard FKM is limited to -15 ˚C.

Successful assembly first requires careful preparation. By following a few simple steps, you significantly increase the chances of a flawless assembly.
There are a wide range of oil seals to select from for any number of uses, so this guide will break down the most common seals to help you choose the right one for whatever piece of machinery you are working on.