Seam Grip is a seam sealer and outdoor repair product all in one tube. Seam Grip is the only seam sealer approved by the American Alpine Institute. This permanent waterproofing repair kit seals and repairs tents, rainwear, gloves and more. Ideal for natural and synthetic fabrics, leather, waterproof laminates, vinyl, and more. Use the optional seam accelerator for 2 hour jobs. Brush applicator included.