Material Composition High-performance aluminum foil laminate with woven fiberglass or polyester base
Surface Finish Reflective aluminum or metallized PET (polyester)
Reflectivity ≥ 95% (Solar Reflectance Index - SRI typically > 85)
Thermal Conductivity Low; typically < 0.03 W/m·K
Water Vapor Permeability Very Low / Vapor Barrier (typically 0.02–0.05 perms)