This polyolefin heat shrink tubing is used for Insulating and protecting soldered onnections and connectors. It is available in your choice of adhesive or non adhesive inside coating. Lisle's heat shrink tubing also works for marking and bundling wires. Tubing is halogen free and UL & CSA certified at 600V@125°C. Shrinks at 194° - 248°F (90° - 125°C) with a radial shrink ratio of 3:1 (Adhesive) and 2:1 (Non Adhesive).