ADFOAM POLAR 1825 is a one-component, self-expanding, ready to use polyurethane foam. It is used for insulation on windows, doors, curtain wall perimeters or any other gaps that need to be filled. It contains CFC-free propellants, which are completely harmless to the ozone layer. ADFOAM POLAR 1825 reaches R5 (thermal resistance) per square inch insulation rate. It adheres to most common construction materials and can also be used in plumbing and electrical applications.