CertainTeed WinterGuard Sand Underlayment

The CertainTeed WinterGuard is Composed of an SBS-modified asphalt that is saturated in the membrane and coated over the membrane. This makes a tough reinforcement that is self-adhering and waterproof. The top surfaces of the Winterguard sand and granular both are composed of mineral matter. This enhances traction during application. All Winterguard products, however, are protected with a disposable release film that is coated with silicone, and this release film happens to be divided longitudinally down the center for simpler application. Also, Winterguard products are most commonly used in critical areas on a structure. Winterguard Sand and granular underlayments, however, are commonly used in places that help to prevent leakage in a structure due to water back-up from ice dams or wind-driven rain.

Please Note: WinterGuard is warranted against manufacturing defects and to remain watertight for the same period as the warranty duration carried by the shingles applied above it -- up to a maximum of 50 years.