Ancor's cross-linked polyolefin tubing is much stronger than PVC tubing and will not burn like PVC. Heat-activated adhesive lining is an impervious seal to saltwater, oil, acids, and sunlight, and also provides strain relief. Shrinks to 1/3 of the original size at 257°F. Lining is impervious to saltwater and acids Shrinks to 1/3 of the original size | 12" x 1/2" Heat-Shrink Tubing 5-Pack