Seam Grip by McNett works on all types of fabrics and surfaces, including neoprene, PVC, rubber, leather, vinyl and synthetics.__ Unaffected by extreme cold or heat, it goes beyond patching holes - it will waterproof tent seams, improve traction and offer abrasion resistance too.__ Take a tube of Seam Grip wherever you go, because you never know when gear will rip, leak or fall apart._Urethane based seam sealer and repair adhesive Permanently seals seams and repairs rips, tears and holes in outdoor gear Winner of 'Editors Choice Gold Award' from Backpacker Magazine Flexible, waterproof formula, safe for use on natural and synthetic fabrics 1 oz tube NOTE:  Please note that Seam Grip is NOT suitable for use on Sil-nylon (silicon based) tent fabrics.