It is dispensed through a straw-like plastic tube that is packaged with the can.
The foam works best at room temperature. The structure of the hardened foam provides excellent insulation against heat and noise. DeWalt Engineered by Powers PowerFoam� 29OZ Expanding Polyurethane Foam - By International Tool PowerFoam is a single component, moisture curing expanding polyurethane foam. When installing the foam, consideration should be given to the 2-3 times expansion of the foam after it leaves the plastic tube.