Tundra seal. EPDM rubber pipe insulation is a flexible, closed-cell and lightweight EPDM based elastomeric material designed for insulating liquid cooling and heating lines. The closed-cell structure makes it an efficient insulation. UV-resistant, low thermal conductivity, easy-to-install. Versatile for heating, AC refrigeration and plumbing. The adhesive chemistry bonds the insulation to the tube ensuring a seal for the life of the system. Retards heat gain on low temperature applications and prevents heat loss on hot water application. Temperature usage range is -70 deg. F. to +257 deg. F. 6' long pieces. No. PB05058TWTU0: Size: 5/8" x 6', Material: Rubber, Wall Thickness: 3/8", Temperature Range: -70 deg F to +257 deg F, R Value: 3.1, Pkg Qty: 1 No. PB05078TWTU0: Size: 7/8" x 6', Material: Rubber, Wall Thickness: 3/8", Temperature Range: -70 deg F to +257 deg F, R Value: 2.9, Pkg Qty: 1