Tough Repair Adhesive Seals Seams and Fixes Almost Everything. Gear Aid Seam Grip® is a gear repair kit in a tube. Use it as a tent seam sealer, sleeping pad fixer or equipment rebuilder. Works on all types of fabrics and surfaces, including neoprene, PVC, rubber, leather, vinyl and synthetics. Seam Grip goes beyond seam sealing and patching holes. It waterproofs tents, improves traction and offers abrasion resistance, too.