Thick-walled heat shrink tubing. Halogen-free. Self-extinguishing. Low smoke density. DIN EN 45545-2 (HL3) approved. High shrink ratio 4:1. The thick-walled heat shrink tubing HR47 is halogen-free, self-extinguishing and has a low smoke density. The product also offers good mechanical protection as well as abrasion and kink protection, for example. These properties are ideal for applications with high concentrations of people, such as in trains, buses, airplanes, tunnels and elevators.