Lesson 3.1: Incomplete or Incorrect surface cleanup and prep.

Mistake #1: Incomplete or Incorrect surface cleanup and prep.

To have a successful formed-in-place gasket, you need to prep both surfaces so that you’re working with clean, bare metal. Failure to clean ALL of old gasket or gasket maker materials may result in the mating surfaces coming together in an uneven alignment. This can compromise the seal and the operation of the assembly. This is where you can go crazy and make your own problems. What methods are available to clean the parts? Scrapers and Razor Blades (both metal and plastic), Roloc discs, Sandpaper, Scuff Pads, What is not available? A Chemical RTV Remover, although some people will use Brake Cleaner, Acetone, and other chemicals you need to be careful with. If you have to use a metal scraper or metal razor blade, be very careful not to damage the mating surface.