Henry 3 Ft. W X 33.3 Ft. L Fiberglass Self-adhesive Shingle Underlayment 15 Lb. Blue

Waterproofing underlayment. Composed of a high tack rubberized asphalt, coated on a non-woven glass fiber mat. Lower surface has a split-release silicone release backing for ease of application. Specifically designed to provide secondary waterproofing protection to shingles as well as prevent ice damage and wind driven rain. Meets ASTM D1970-08 standard and is ICC listed. Self-sealing when penetrated by mechanical fasteners or roofing nails. Fully adhered system prevents lateral moisture migration Self-sealing when penetrated by mechanical fasteners or roofing nails100 square feetFully adhered system prevents lateral moisture migrationSand surfaced for slip resistanceUL classified class a fire classification under fiberglass, shingles and class C under organic felt shingles