Products / APOC Weather Armor HT High Temperature Roof Underlayment (HT2 / HT3)

APOC Weather Armor HT is a self-adhered, high-temperature roof underlayment and leak barrier made with high-melt bitumen, rubber polymers and a laminated polypropylene surface, for use under metal, tile, shingle and slate roofing. It is offered as HT2 (50 mil) and the premium HT3 (60 mil, cross-laminated surface), each with its own data sheet. Both data sheets list properties tested under ASTM D1970, including nail sealability and low-temperature flexibility, a vapor permeability under 0.1 perm, and priming with APOC 103 where needed.