Profile: Polymaster, Inc. is a manufacturer of foam insulation products. Our Incylthane is a spray polyurethane foam applied in stud-wall cavities, and in metal buildings with cavities. This foam provides a self-adhering & seamless insulation barrier. This foam is available in three densities including 500, 1700 and 2000. Our PolyMaster R-501 foam insulation is a thermal and acoustical insulation that is designed for use in concrete block walls & cavities in commercial structures. Our PolyMaster R-501 foam insulation is a cost-effective, environmentally green thermal & acoustical insulation that is designed for use in concrete block walls and cavities in commercial structures.