Welt-Seal is a unique, nitrile rubber adhesive. It was developed to solve special problems in the welts, stitching and seams of outdoor footwear. Welt-Seal is so effective it is used by welders to prevent the burning of stitches which results in soles falling off. It is used by miners to protect the stitch fiber and the holes from the abrasive effects of minerals. It is resistant to almost everything, including acids, fuels, corrosives and abrasives. It is a terrific adhesive and seam sealer where long-term flexibility is required. Welt-Seal matches the flexibility of silicones and urethanes, yet has the high strength usually found only in rigid adhesives. Can also repair inflatables, tent seams, rain gear, wet suits, rubber boots and more.