Seamless Double Stick Rubber Pipe Insulation, Flexible Closed Cell, Black w/blue ink. An Enviormenally Friendly, CFC Free, Flexible elastomeric thermal insulation. Used to retard heat gain & prevent condensation or frost formation on refridgerant lines, cold water plumbing and chilled water stystems. Retards heat flow for hot water plumbing, liquid heating, dual temperature piping & many solar systems. Use indoor, outdoor, underground. Resistance to moisture & vapor flow. Flame & Smoke Rating. CFC-free.