APPeX® 4.5M is an APP modified bitumen sheet. It incorporates the features of a tough, non-woven, polyester mat that is saturated and coated with a blend of APP (Atactic Polypropylene) polymer and high quality asphalt. APPeX 4.5M has a construction that provides an extremely durable sheet with excellent weathering properties. The premium APP asphalt blend is formulated to provide excellent physical properties for ease of installation and long-term roof performance.
The polyester mat provides good tensile strength, toughness and puncture resistance and can accommodate stresses created by typical rooftop expansion and contraction forces.
The covering layer of ceramic-coated roofing granules provides durability along with superior resistance to damage from weather and foot traffic. The white granular surface also provides heat reflectance. The back of the sheet has a printed polyolefin burn-off film adhered to a diamond embossed, textured surface for ease of heat welding.