ROBERTS® Silicone Moisture Barrier Underlayment is designed to protect floors from moisture, without trapping it underneath the floor covering. It is made from 100% recycled contents that are environmentally safe, and a baked silicone coating that provides moisture impermeability under wood flooring. As a recycled product, it may have slight color variations that do not affect the quality of the product or its performance. Easy to install, its smooth top surface allows for quick marking of chalk lines and sliding planks into position. It meets the perm ratings recommendation by the National Wood Flooring Association (NWFA) for staple and nail-down installations of solid and engineered wood floors.