The SELITAC® underlay range is one of our premium products. Manufactured from high pressure resistant extruded polystyrene foam, these underlays are impressive thanks to their outstanding performance data. From 2.2 mm for low installation heights up to 5 mm for excellent thermal insulation. SELITAC® underlays with AquaStop have an integrated vapour barrier to protect against rising moisture. They are certified by TÜV Rheinland and feature the Blue Angel to confirm their status as particularly environmentally friendly products.