Rmax R-Matte® Plus-3 is an energy-efficient thermal insulation board composed of a closed-cell polyisocyanurate (polyiso) foam core bonded to reinforced aluminum facers on each side. While one side of the board has a reflective surface, the other side has been coated to have a nonreflective white matte surface. Boards can be installed with either the silver or white side out. For additional radiant barrier properties, install silver side against air space if one exists.
WARNING:Cancer and Reproductive Harm - www.P65Warnings.ca.gov