I have a shower over the bath, the tiling was done after the bath was fitted and as far as I can work out there must be a gap between the bath and the wall. During a shower the water drips through the kitchen ceiling below. I have sealed it many, many times, and I've currently resorted to thick waterproof tape over sealant but of course that isn't working. I need a temporary fix until someone can come and sort it properly (or fit a new bathroom). It is a p shaped bath and I have really limited access under. I thought using expandable foam underneath and sealing the top again might help, although I don't know if I can reach all the way along. Maybe a wooden baton glued (no way I can get my arm and a drill under) to the bath and wall to block the gap but I'm guessing that would eventually soak through. I would love any better ideas that would be relatively easy for my limited diy skills.