Typar.Surround SR Underlayment offers secondary protection against moisture intrusion. The tear-resistant roofing material is made from a waterproof synthetic polymer offering improved durability, slip-resistance, and faster installation compared with traditional roofing felt, the maker says. A single roll offers five times more material than a roll of 30-pound felt and is 40% lighter and 25% wider for quicker coverage. Surround SR is designed to resist wrinkling when wet and will not absorb water. The heat-reflecting gray surface also helps reduce heat buildup on the roof. 800.284.2780. www.surroundtypar.com.