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About product and suppliers:
        Alibaba.com offers 320,565 membrane products. About 12% of these are waterproof membrane, 5% are water treatment, and 2% are geomembranes. 

A wide variety of membrane options are available to you, such as free samples, paid samples. 

There are 317,900 membrane suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Hong Kong, and Turkey, which supply 98%, 1%, and 1% of membrane respectively. 

Membrane products are most popular in North America, Domestic Market, and Oceania. 

You can ensure product safety by selecting from certified suppliers, including 105,573 with ISO9001, 35,467 with ISO14001, and 27,003 with Other certification.