Ideal solution for air conditioning and refrigeration systems: Ottocool "Ready to Use" Montage Kit. Closed-cell expanded Polyethilene. Gets a Maximum saving with low coefficient of thermal conductivity (0,036W/mK). Maximum Fire Safety with self-extinguishing CL. 1- DIN4102 B2. White external extruded PE-Layer, nontoxic gases and resistant to external chemical agents and ultra-violet rays.