Grace Select roofing underlayment is composed of two waterproofing materials' rubberized asphalt adhesive, backed by a layer of high density cross laminated polyethylene film. The product is making it lightweight and easy to handle and apply. The unique, advanced rubberized asphalt formulation allows the membrane to meet industry standards for fastener sealability equivalent to products that are often significantly thicker and heavier. The rubberized asphalt is backed by a paper release liner that protects its adhesive quality. The Ripcord embedded in the adhesive provides the applicator a split release on demand feature, making it easier to apply in detail areas. The release liner is easily removed allowing the rubberized asphalt to be bonded to the roof deck.