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About product and suppliers:
        Alibaba.com offers 4,057 drainage board products. About 28% of these are other earthwork products, 20% are waterproof membrane, and 1% are geocells. 

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

There are 4,075 drainage board suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and India, which supply 99%, 1%, and 1% of drainage board respectively. 

Drainage board products are most popular in Africa, Southeast Asia, and North America. 

You can ensure product safety by selecting from certified suppliers, including 3,843 with ISO9001, 1,634 with ISO14001, and 723 with OHSAS18001 certification.