What began as simply molding rubber seals and gaskets for the automotive industry grew into custom rubber mixing as a primary focus. Colonial DPP began in 1946 and has since then been a diverse rubber supplier in North America. This company is ISO 9001 / ISO 14001 registered and follows ASTM and RMA procedures. Production parts include molded cellular rubber, molded dense rubber, extrusions and die cut rubber seals and gaskets. Production portfolio also includes rubber to metal and plastic bonding, vulcanize rubber sheets, rubber compounding and much more for you to view on the website!