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About product and suppliers:
        Alibaba.com offers 855 hardener additive products. About 22% of these are petroleum additives, 15% are rubber auxiliary agents, and 14% are plastic auxiliary agents. 

A wide variety of hardener additive options are available to you, such as coating auxiliary agents, water treatment chemicals, and petroleum additives. You can also choose from chemical auxiliary agent, phosphate. As well as from food grade, agriculture grade, and medicine grade. And whether hardener additive is free samples, or paid samples. 

There are 855 hardener additive suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of hardener additive respectively. 

Hardener additive products are most popular in Mid East, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 607 with Other, 398 with ISO9001, and 138 with ISO14001 certification.