SitaSani 63 or SitaSani 90/105 insulating block, made of polyurethane, size 500 x 500 x 60 mm, rated thermal conductivity λD=0.025 W/mK, compressive strength 200 kPa, bulk density approx. 50 kg/m³, as an installation aid and thermal insulation for the prevention of thermal bridges, supply and install to professional standards.