Your Source for One Polymer APP Compounding If you’re a commercial roofing manufacturer, you rely on the quality and consistency of your raw materials to produce durable, weather-resistant membrane roofing solutions for your customers. At SD Polymers, we leverage more than 50 years of deep knowledge and experience to deliver the products and services you require on time and at a competitive price. Specializing in custom blended APP compounds for APP membrane production, SD Polymers offers domestic and international modified bitumen manufacturers a unique single polymer solution that provides several advantages over traditional APP and APAO polymer suppliers. Products APP Compound Rubber Fiberglass and Polyester Mat Services Toll Services (grinding, blending, compounding, pelletizing and packaging) Converting Services (slitting, rewinding, splicing and sheeting)