Gardner Bender heat shrink tube is insulated PVC tubing material. Each tube is very flexible and flame retardant. This PVC heat shrink tube is a great insulator for general wire splices terminals and other electrical connections. The polyimide adhesive in each tubing type below will melt and flow when heated with a heating torch encapsulating and sealing the components contained within and it also provides strain relief for electrical wire connections. Heat shrink tubing is great for cable insulation marking and bundling with superior mechanical abrasion and moisture protection. The Gardner Bender Well Pipe Wire Splice Kit can be used for waterproof repair of well pipe cables. The kit is designed for well pipe cables 8-14 AWG. The kit includes a set screw splice connector and one 4-inch heavy wall polyolefin heat shrink tubing with a watertight adhesive lining. Gardner Bender has 50 years of experience making professional electrical tools and supplies of consistently superior quality so you can count on high-performance products at a fair price.