TriggerFoam Pro window and door foam is a professional grade, low pressure, gun-applied, polyurethane foam sealant. This foam does not distort window and door frames when expanded. TriggerFoam Pro adheres to wood, metal, masonry and concrete. It seals gaps and joints, insulates, stops air infiltration and saves time and money and is good for use around pipes, wires and ductwork. The precision value helps prevent pressure loss and prolongs shelf life. Voids should be filled approximately 30 to 40 percent to allow for the final expansion of the foam. Recommended curing time is 24 hours prior to scraping or painting and is physiologically harmless when fully cured.