Owens Corning WeatherLock Mat Ice and water shield 36-in x 66.7-ft 200-sq ft Polypropylene Roof Underlayment

Acts as a second layer of protection under shingles

Ideal for all underlayment applications such as full roof deck coverage, eaves, rakes, and valleys

Patented Sure Step mat-faced design helps provide for a consistent surface, reducing slipping, sticking, and scuffing

40% Lighter than standard mat-faced underlayment products, making it easy to load, carry, and install