Products / APOC Weather Armor CrossOver CX-L Hybrid Roof Underlayment

APOC Weather Armor CrossOver CX-L is a hybrid roof underlayment that combines properties of organic felt and synthetic products, designed to shed water. Its technical data sheet lists a thickness of 0.60 mm by ASTM D1777, a permeability of 0.05 perms by ASTM E96, a pass result for water transmission under ASTM D4869, and a service temperature range of -40 to 240 degrees F. The maker publishes a separate lifetime application specification for it.