Basic weight (g/m²) = 160 ± 10% Tensile strength (astm d 828) knm = md: 6 - 8; xd: 7 – 9 Water resistance = no delamination Vapor resistance = excellent Tear resistance = good - double sided aluminum foil (99% of pure aluminum foil) reinforced with fiberglass scrim. - certified for fire retardant class 'o' (bs476 part 6 & part 7). Impermeability to moisture & vapor maintains even when creased. - characteristics of these product are not easily changed by hot roof temperature/high humidity of tropical climate & is stable & will not delaminated when exposed to moisture from hvac ducting. Packaging: 1.22m x 45m in roll form in pallet 1.22m x 60m in roll form in pallet