Sika Rmax Pro Select R-Matte foam insulation boards are versatile, multi-application boards with a durable white-matte (non-glare) reinforced aluminum facer on one side and a reflective reinforced aluminum facer on the reverse. This thermal insulation is designed for use in Stud walls, cavity walls, masonry walls, exterior stucco, re-siding, vaulted ceilings, attics/crawl space, concrete foundations, exterior ducting, and limited roofing. This product is an excellent choice for many do-it-yourself applications to add insulation value to any project. This ENERGY STAR qualified board provides R-13.1 with dimensions of 2 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.