Silicified Waterproof Weatherstrips Silicified Waterproof Weatherstrips By the polypropylene yarn, polypropylene filament and polypropylene particles synthesis. Product Test Center by the National Building Materials testing in accordance with industry standards JC/T635-1966 qualified. Features: 1) Weather pile strip is made of polyproplene yarn 2) Suitable for all kinds of alumnum window 3) Color: grey.white and so on . 4)Product standard: ISO9001:2000, ROSH 5).Firm and durable 6).High-sealed, high-weatherproof,waterproof 7).Anti-noise, anti-wind, anti-dust, anti-aging 8).Good elasticity, good-performance, exquisite craft 9).Suitable for various of windows,doors, easy installation 10).Various of colours, specifications for your wide selection 11).Popular around the world, the best quality, the best price 12).Conforms to BS6375, BS5368, the BS476 against smoke experiment and the BS5821 sound-insulated experiment standard