Eco ProCote Natural Soy Penetrating Concrete Stains and Sealers are made from bio-based soy esters to create appearances similar to acid staining—without the toxicity. Developed to meet several environmental regulations for green building, the stains penetrate porous substrate surfaces to create semi-transparent color variations and tones that resemble natural stone. The sealers help protect against weather, marring, stains, and efflorescence. Eco Safety Products LLC. 877-366-7547.