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
- Brand Name: Henry
- Width: 3 ft.
- Length: 33.3 ft.
- Material: Fiberglass
- Product Type: Self-Adhesive Shingle Underlayment
- Weight per Sheet: 15 lb
- Color: Blue
- Coverage Area per Package: 100 sq ft
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