cometic gaskets

I had cometic gaskets make me .100 thick head gaskets. I had j heads milled down to 59 cc for my race motors. I wanted to use those heads on a street motor I put together. So I had cometic make me the head gaskets to get my compression ratio to 9.5 to 1. I have reused the gaskets 3 times with no sprays or adhesion and no leaks.