Help cans find old thread to fix leaking camper bed.

I’ve finally gotten the camper top off my truck to take it in for the 3rd brake light recall. I’ve been meaning to do it for awhile but got the final warning letter and finally pushed me to do it. I have a leaking bed, like most of us. I rember seeing a thread with fixes for it, but can’t find it now. For whatever reason when I try to search for it all I get is what have you done today post. Apparently I need to learn how to search better. Any help is appreciated.