Hvy Wall H/S Tubng .750 Red 12Adhesive lined heat shrink tubing covers wire and cable and when heat is applied it shrinks the tubing and melts the adhesive to create tightly sealed bundles. The melted adhesive wall also creates a moisture resistant barrier that allows this tubing to be used in wet environments. Also known as dual wall heat shrink tubing it is used across a wide variety of applications to insulate protect bundle and provide strain relief for wire and cable.