Henry Eaveguard Shingle Underlayment Self-adhering shingle underlayment provides a secondary line of defense with direct to deck installation. Install under new shingles to prevent leaks and ensure the longevity of a roof. Protects against ice and water damage. Self-sealing around nails and fasteners for lasting watertightness. Slip-resistant surface. 1.5mm 60 mils thick. UL classified. Size 3' x 33'3 , Color Black, Thickness 60 mil, Type Self-Adhering, Coverage Area 100 sq ft, Pkg Qty 1, Package Type Shrink Wrap WARNING This product can expose you to chemicals including polycyclic aromatic compounds possibly present in asphalt in trace amounts which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.