This is not your usual make a river in my tabletop question. (Although I love those as well)
In my case, I have a metal tray under my giant hot water heater. It is clear that this tray leaks, and is ruining the subfloor under it. I need to pour some resin in there (which will keep getting water dripped on it) and have it clog all those mini-holes.
If such a resin exists, can you tell me which one, and where to get it cheaply? I’ll probably need a gallon or two.
Thanks.