Monier LifeTile. Eligible for LEED points, StrongSeal roofing underlayment is made from recycled tire rubber that has been cryogenically ground and formed into an asphalt-free underlayment that contains no oils to leach out. Its engineered rubber content is flexible and durable, making the product resistant to tearing, puncture, rain absorption, and sun degradation. The thick rubber membrane promotes traction in both wet and dry conditions and provides a watertight seal around fasteners. 800.571.8453.