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. The product adheres to wood, metal, masonry and concrete. It seals gaps and joints, insulates, stops air infiltration and saves time and money and is ideal for use around pipes, wires and ductwork. The foam is dispensed though a standard foam gun that allows the user to control the flow rate and the diameter of the bead. The easily adjustable applicator can dispense foam beads as small as 1/8 inch, allowing for precise placement of the foam. 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. The product is safe to use, containing no CFCs no PCBs and no urea formaldehyde as they are being dispensed, and has a neutral odor. The stop-and-go application product remains liquid in the applicator until dispensed.