The caulk I used on my fiberglass tub surround has cracked and become brittle. Obviously, I didn't know the right stuff to use.
The installer left gaps that are larger than I would like, but there is nothing I can do about that now.
What (white) product should I use that can fill a 1/4 inch gap and stay flexible? The surround is contoured, do I need a backer too?


