R-Tech is an engineered rigid insulation consisting of a superior closed-cell, lightweight and resilient expanded polystyrene (EPS) with advanced polymeric laminate facers. The core of R-Tech is the same high-quality EPS as InsulWall brand insulations. In addition, R-Tech has excellent dimensional stability, compressive strength and water resistance properties. R-Tech is available with factory adhered metallic-reflective facers, white facers or a combination of the two.