Review on E-SDS RV Sealant Tape – 4 Inch x 50 Foot Roofing Tape for RV Repair, Window, Boat Sealing – UV & Weather-Resistant – Camper Roof Leaks Fix – White by Phil Casey

Not what I expected when I ordered this roll to finish encapsulating the crawl space. It's a lot thicker than the shrink wrap I used before. This is a hard mode and by all means don't let it sit back and touch you when the back is off as you won't be able to take it apart. I would trust this material to seal and prevent leaks on my van roof. Especially if the sun hits him for a day or two. In fact, it's just a wide band of butyl.