When the seams on a rain jacket start to leak after a season of hard use, the Seam Grip WP Waterproof Sealer is the clear waterproof seam sealer that closes them again. The same urethane sealant works on tent, tarp and awning seams and on backpacks and stuff sacks, so one tube covers the gear that sits out in the weather. What Our Gearhead(R) Experts Are Saying:"Before a rainy weekend, I ran a bead of Seam Grip WP along every seam of an older tarp and patched a small hole with the same tube. It cured into a flexible rubber seal, so the tarp still folded and shook out like it always had."