Self-sealing tape, just peel back and press. 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 (ultraviolet) 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 applications.