Rubber tire marks, dock plank gouges and the hassle of handling bulky, old-fashioned fenders don't have to be a part of your boating world. Mooring Products International manufactures thick polyvinylchorlide (PVC) dock fenders that absorb shocks without damaging boats. These heavy duty fenders are completely weather, saltwater and oil proof. They have UV inhibitors to withstand the sun and are fire-resistant.