Stay Dry Inside your Tent in the Worst Storms We have combined two great water proofing sealants for your tent: Seam Sure will waterproof all seams blocking water from entering your tent, tarp, pack and rainwear, and Tent Sure a high performance, water based urethane formula designed to re-coat worn areas on waterproof coated synthetic fabrics.Tent Sure:Tent SureTM is a high performance, water based urethane formula designed to re-coat worn areas on waterproof coated synthetic fabrics. Tent Sure dries to a clear, flexible, long lasting film with a nearly invisible, non-gloss finish. Ideal for tent floors and flys, bivy sacks, rainwear, clothing, fabric accessories and hundreds of items using synthetic fabrics.Waterproofs up to 85 sq. ft. Concentrated urethane formulas Durable and long lasting Non-toxic Water based, eco-friendly Clear, nearly invisible finish Always use prior to applying ReviveX water repellent treatments Seam Sure:Use Seam SureTM Water Based Seam Sealer to seal and waterproof the seams of your tent, tarp, pack and rainwear. Durable, odorless and flexible, Seam Sure is perfect for family-sized tents. Plus, its water-based formula is good for the earth. Ideal for sealing seams on polyurethane coated fabrics.Seam Sure flexes with the fabric insuring waterproofing even in cold temperatures and high wind conditions. Our unique brush applicator allows the user to easily apply Seam Sure into needle holes, sewn joints, corners and under lap-felled and folded seams. Fast drying, super easy to use Odorless, water-based urethane formula Dries clear, stays flexible Works on tents, tarps, packs and rainwear