Royaltherm 1711 Silicone modified ethylene-propylene diene terpolymer Chemtura (Crompton-Uniroyal Chemical) Acrylic Monomers Coil Coating ROYALTHERM® 1711 ROYALTHERM 1711 a modified EPDM with a special silicone rubber. ROYALTHERM is supplied as a base compound that can be vulcanized with peroxides or sulfur/accelerator systems. ROYALTHERM 1711 is 55 - 65 Durometer when vulcanized with 1.8 phr of dicumyl peroxide. It can be blended with 1411 for intermediate hardness applications. ROYALTHERM 1711 is recommended for applications that require higher tensile strength than 1411. ROYALTHERM 1711 is also recommended for applications that require retention of mechanical strength at elevated temperatures, weather and moisture resistance, electrical stability and compression recovery at low temperatures. ROYALTHERM® 1411 ROYALTHERM 1411 is a modified EPDM with a special silicone rubber. ROYALTHERM is supplied as a base compound that can be vulcanized with peroxides or sulfur/accelerator systems. ROYALTHERM 1411 is 35 - 45 Durometer when vulcanized with 1.8 phr of dicumyl peroxide. It can be blended with 1711 for intermediate hardness applications. ROYALTHERM 1411 is recommended for applications that require lower tensile strength than 1711. ROYALTHERM 1411 is also recommended for applications that require retention of mechanical strength at elevated temperatures, weather and moisture resistance, electrical stability and compression recovery at low temperatures. coil coating. Royaltherm® 1711 is a modified EPDM with a special silicone rubber. Royaltherm is supplied as a base compound that can be vulcanized with peroxides or sulfur/accelerator systems. Royaltherm 1711 is 55 - 65 Durometer when vulcanized with 1.8 phr of dicumyl peroxide. It can be blended with 1411 for intermediate hardness applications. Ethylene-propylene diene terpolymer modified with a special silicone rubber. Used as a base compound in coil coatings. Can be vulcanized with peroxides or sulfur/accelerator systems. Provides high tensile strength, retention of mechanical strength at elevated temperatures, weather and moisture resistance, electrical stability and compression recovery at low temperatures.