AURUM MOUNT IND. CORP. established in 1981, major produce rubber expansion joints and flanges. Our rubber expansion joints and flanges, supplied quality material processed by skilled workers, turned our BYPRECISION machines and inspector by strict quality control, are of superior quality and reasonable price. ARMFLEX expansion joints are molded and vulcanized in hydraulic presses. This high-pressure process pro-duces a smooth finished product with outstanding adhesion between the cover, reinforcement and tube. Most of our competitors still use Natural Rubber impregnated Nylon tire cord between sulfur cured, Nature Rubber or EPDM plus Nature rubber covers and tubes. This construction becomes brittle with age at higher temperatures, so we changed Nylon to Polyester. Polyester has a higher modulus that swell and elongation, and outstanding temperature up to 240°F (115°C). Our ARMFLEX rubber joint use 100% EPDM as cover and tube, polyester reinforcement and middle special synthetic rubber. Our 100% EPDM Tube and Cover meet The Fluid Sealing Association Standard (FSA Standard). Most of other factory use Nature rubber or EPDM+Nature rubber as Tube and Cover can’t adhesive the middle rubber and easy separate at high temperature. ARMFLEX 100% EPDM full adhesive the middle rubber no separate at high temperature. Most factory use Nylon Fiber. We use Polyester fiber better then Nylon. Polyester better than Nylon fiber. We use synthetic rubber frication on polyester fiber. Nature rubber use at High temperature, the life time become short. AURUM MOUNT always supplies very good rubber joints.