Lesson 3.7: Trying to fill a large gap with an anaerobic gasket maker.

Mistake #7: Trying to fill a large gap with an anaerobic gasket maker.

Anaerobic gasket makers and flange sealants are designed for sealing  assemblies where two close fitting machined metal surfaces come together. They’re generally recommended for gaps of up to 15 to 20 thousandths of an inch only. If you’ve got larger gaps – such as sealing a stamped steel oil pan, you should be using an RTV gasket maker.