Keep your adventure going with the Gear Aid Seam Grip Waterproof Sealant and Adhesive, which can repair holes and waterproof seams. This urethane-based sealant can seal up to 144 inches of seams, cures in around 8-12 hours and is safe to use on natural and synthetic fabrics. Gear Aid Seam Grip Waterproof Sealant and Adhesive - Camping Accessories at Academy Sports