Had a leak in drain pipe for central air conditioner and could not locate exactly the source of the leak. Every time the humidity went up we would get about an inch of water on the floor in the garage. Had to apply several coats of the Flex Seal spray, but was able to seal the leak and regain use of garage regardless of the humidity outside.
Cracks, Leaks, About to Crack which leads to leaks. Whatever the problem is it is about to be spray some Flex Seal on it *UNLESS* THE AREA GET TO HOT then it becomes flex not so seal!!!
But, if instructions are read that. This product is great spray, let it set... Repeat for thicker more durable seal!
I have one saying if Flex Seal won't Seal it than THERE'S ONLY 1 OPTION... Just light it on fire and let it be someone else's problem...
***SARCASM ALERT PLEASE DONT LIGHT ANYTHING ON FIRE***