TruGrain™ made with Resysta® is manufactured by Westech Building Products Inc., a Westlake Chemical company, is a manufacturer of polyvinyl chloride (PVC) fence, decking, railing extrusions, and custom window and door profiles. Westech has been a leader in the building products industry for many years, a reputation that has been earned through strong leadership, product innovation, vertical integration, and a commitment to engineering and manufacturing practices that exceed regulatory requirements and industry standards.