Welcome to US Polymers

US Polymers is California corporation and a member of the Harwal Group. Established in 1983, USP has four divisions including Building materials, Custom profiles, Storage buildings and Window Shutters. The international resources with years of experience and trained staff allow USP to need all your extrusion needs.

Who We Are

Since 1983, US Polymers has been serving industries with vinyl building materials and home improvement products

Our Mission

Our mission has always been to provide innovative and high quality products and excellent customer service

US Polymers Divisions

Building Products

DuraMax makes outdoor vinyl fencing, patio covers and decking products designed to help you make the most of that wonderful place you call home. Specially engineered to withstand the rigors of the Southwest sun, Duramax is known for its high quality and durability.

Storage Solutions

DuraMax storage solutions offer a wide range of durable sheds, garages, greenhouses and other products come in a wide variety of sizes and colors to provide the perfect storage solution for your backyard.

Custom Profiles

Optimize your custom profiles with design engineering. Our large staff of inhouse engineers, will optimize your ideas with the perfect product design that reduce costs and maximizes function.

Window Shutters

With over 25 years of experience designing and fabricating custom-made shutters, ShutterSMART is North America's leading shutter manufacturer known for making quality affordable shutters quickly and conveniently. Shutters provide not only timeless elegance but also the highest rated energy efficiency of any window covering, providing a green solution that reduces cooling and heating costs


Building Products
Storage Solutions
Window Shutters


Our Client’s

USP Facilities

USP Corporate Headquaters
1057 S.Vail Ave. Montebello CA 90640 USA
USP Polymers Extrusion Facility
5910 Bandini Blvd. Commerce, CA 90040 USA
USP Harwal Group
Dubai industrial Park, UAE