Located in the heart of Green Bay WI, Greenstone Polymer Systems, Inc. manufactures polymer based epoxy flooring, lining, grout systems and specialized coatings. Greenstone manufactures industrial Linings, Coatings, Grout, and Epoxy Flooring in Green Bay WI. Systems Available in Trowel, Roll, Brush, Spray, Squeegee, Screed, Pourable, Castable and Injection