LeakBarrier PS200HT Ice and Water Armor is a premium, glass fiber reinforced, SBS modified, self-adhesive modified bituminous roofing underlayment for use under tile, metal, slate and asphalt shingles. LeakBarrier Ice and Water Armor is manufactured with a specially engineered Hybrid Polymer System formulation that allows the underlayment to withstand high temperatures (resistant up to 260°F). It is surfaced with a polyester fabric on the upper layer to provide a nonabrasive surface that also offers excellent walkability.