... . Product Features: Air-proof, Water-proof, sound insulation, thermal insulation, Anti-aging, Good-combustion-retarding performance, Easy maintenance ... various profile types * With Thermal Break, More Energy Saving, sound and heat insulation *Normal aluminium safety and ... frame c. as per your requirements or nominated modelsPerformanceSound insulation: RW ≥ 28dB, Wind pressure resistance: third class ...