Make the best connections possible with the Adhesive-Lined Heat-Shrink Tubing from Ancor. Cross-linked polyolefin tubing is stronger and more burn-resistant than PVC. Heat-activated adhesive lining provides an impervious seal to saltwater, oil, acids and sunlight in addition to providing strain relief. Shrinks at 257F. Per 3. 3L dia. x0.25. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electrical Accessories.