Green Seal is a non-profit, third-party certifier and standards development body.  Since 1989 it has provided independent, objective, science based guidance to the marketplace and to consumers.  Green Seal is the largest US-based ecolabelling organisation and meets the EPA's Criteria for Third Party Certifiers, the requirements of ISO 14020 and 14024(1), and the standards of the Global Ecolabelling Network (GEN).  Green Seal is the US member of GEN which consists of 26 of the world's leading ecolabelling programs, including Germany's Blue Angel and the Nordic Swan.

A Green Seal Certification Mark on a product means that it has gone through a stringent process to show that it has less impact on the environment and human health. Green Seal takes a life cycle approach, evaluating a product from the raw materials through the manufacturing process and ending with recycling or disposal.  Products only become certified after rigorous science based evaluation, including on-site plant visits.  The Green Seal means that the product has passed the tests, that it works as well as or better than others in its class, and that it has been evaluated without bias or conflict of interest.