Everbuild exact gap foam everbuild evexact7 exact gap foam has been formulated to provide a more precise foam product that only expands by between 5 10 from the bead extruded on application the controlled application significantly reduces the amount of cured excess foam that has to be cut back afterwards the waste disposal of which can be difficult on some sites and reduces the danger of wet foam falling onto the floor and surrounding substrates and the damage and staining this can cause