Gear Aid Seam Sure Water-Based Seam Sealer - This handy sealant comes with a unique applicator to help seal seams on tent floors and rainflys, bivy sacks, rainwear, backpacks and more.Unique brush applicator lets you easily apply sealant to needle holes, sewn joints and corners, as well as under lap-felled and folded seams 2 oz.Water-based urethane formula is designed for sealing sewn seams on synthetic fabrics and breathable laminatesDries to a clear, flexible, long-lasting film with a nearly invisible non-gloss finishBefore use, clean surfaces with Seam Grip Pre-Cleaner (sold separately) or isopropyl alcohol