material for gaskets

[afjsph]

hi
im in the process of making a hho kit. needed some information on the material that is to be used for gaskets. and also what would be an ideal thickness (was tending towards 3mm)

[Havens78]

Lots of gasket threads and info on this site.

just an example

http://www.hhoforums.com/showthread.php?t=7122&highlight=gaskets