The everbuild thermofoam insulation foam is a specially formulated highly flexible pu foam that absorbs component movement thereby giving an air tight seal to reduce heat loss and improve energy efficiency in buildings it adheres to all common building materials including concrete brickwork wood plaster plastic stone metal etc thermofoam has been tested to the latest standard and is not only air permeability tested to en12114200 03 but also acoustic rated to en iso 717 1 up to 64db temperature r