then just reseal the whole area where the backing mates to the glass, and then if that doesn't do it, get another gasket to where the bulb goes into the housing, i used a thin sheet of cork on my tails, but think about it, the only place it can get in is where it matesup, it won't leak through solid glass, and it won't leak through solid metal behind it, so there are only 2 places it can really get in you know?