I have a Bultaco that uses a gasket in between the two case halves. My clymer manual says to coat the gasket in lithium grease to hold it in place. Another source said to soak it in spray silicone grease to aid in dissasembly. A friend of mine coats both side with a thin layer of gray permatex type sealer like yamabond.Which, if any of these, do you think would be best?