Tundra closed-cell polyethylene foam semi-slit pipe insulation is used in residential and light commercial plumbing projects to prevent heat loss and protect pipes from freezing. It is available in wall thicknesses of 3/8 in. to 1 in. size ranging from 3/8 in. up to 4 in. IPS ID. Tundra is available to the trade-in 6 ft. lengths and is also sold in limited sizes through retail stores across North America.