Barton Clam Seal for Inflatables - Just what you need when your inflatable has been punctured on a sharp corner of a pontoon or quay. This highly innovative repair and safety system is effectively a clamp that is held closed by a hand-tightened nut on a threaded rod through the 2 flat pieces. The 2 pieces are connected by a captive lanyard that runs through the rod. The bottom half of the clamp is fed through the hole, and the other half with the nut is tightened by hand. Then you just pump the boat up again and the seal will actually last indefinitely before a permanent repair is needed. The seal will hold fast even when the material is wet, and will repair tears up to 3.5.