Wriston Polymers Pvt. Ltd offers Heat Resistant Rubber Seals. Wriston Polymers Pvt. Ltd is the manufacturer, exporter and supplier of molded rubber products. Wriston Polymers Pvt. Ltd has earned ISO/TS 16949:2002 certification. These Heat Resistant Rubber Seals made of nitrile butadiene rubber compounded specially for heat resistance significantly higher than that of conventional NBR compounds, without sacrificing other desirable properties. The specification was originally released for material used in miscellaneous oil seal and gasket applications for continuous automotive service at temperatures upto 135 deg C with occasional temperatures as high as 150 deg C.