Polyurethane foam with an improved formulation, part of which is based on 100% renewable raw materials (BIOSELENOLS® ). The foam is characterised by its high performance of up to 50 litres and a controlled and very low post expansion of between 40% and 70%. Excellent acoustic (63dB) and thermal insulation (0 035 λ) Low expansion foam: prevents deformation of door and window frames Contains Bio Selenols - Patented formula for sustainable construction High yield: 50 litres