EKOPRODUR S0542 is a two-component system for the production of closed-cell, self-extinguishing, rigid polyurethane foam. Excellent insulating properties of the foam have been achieved through the use of HFO – a fourth generation foaming agent from the group of hydro-fluoroolefins with a low greenhouse effect potential GWP = 1 and zero ozone depletion potential ODP = 0. The system is mainly used as external insulation and sealing of flat roofs. The product is mainly intended for the Western European market.