Bonding foam for dimensional stability
Door frame assembly
In door frame assembly, professionals generally use a bonding foam. They add a hardener to it, just before processing, so it cures independently of atmospheric moisture. The width of the joint to be filled with foam should not exceed 3 to 4 cm.
The optimum processing temperature for bonding foam is +5 to +25 °C; this applies to the contents of the container and to the environment. Temperatures in this range lead to the best curing reaction. To guarantee good adhesion of the foam, the substrate to which the foam is applied must be free from grease, oil and dust.
Bonding foams made of polyurethane possess good dimensional stability and the distance between the materials bonded with foam varies only slightly in practice. Swelling or shrinkage of the foam between the door frame and the wall is prevented.