Seam Grip is the multi-award winning, repair anything, take everywhere, all purpose repair kit in a tube. Part of any good outdoor repair kit, Seam Grip can be used to repair rips in fabrics, waterproof seams on tents, patch holes, and many more. Quite simply the best urethane repair compound you can get. Note: Seam Grip will not work with Sil-Nylon fabrics. Use the specialist Gear Aid Sil-Net compound for silicon treated tent flys and other fabrics with silicon coating.