A premium Ice Damming and Leak protection used for steep slope roofing under all metal, tile, slate, shake and shingle roofing; the only modified rubberized asphalt Peel & Stick underlayment with a patented slip resistant "Sure-Foot" nodular walking surface technology that allows for easier steep slope walkability, even in wet or dusty conditions. PSU30 also features a crinkled silicon treated poly split release liner making removal quicker and easier than single sheet competitors. Features a self sealing lap seal system which forms an impervious asphalt to asphalt bond at overlapping seams, delivering superior waterproofing protection; an approved Polyfoam underlayment for use with Polyset foam systems; Class A Fire ASTM E108; Meets and exceeds ASTM D1970; high temperature (240 F / 115 C) flow resistance; Installation temperature 40 F (5 C) and above; synthetic construction inert to mold growth; cool light gray surface doesn t expand or contract; up to 6 months UV exposure; Roll size: Gross 216 sq. ft. or 20m ; Net of overlap 2 sq.