Ultra Black oil-resistant RTV silicone gasket maker is a fast-curing, metallic black, noncorrosive formula that—when fully cured— can fill gaps up to 1/4". It easily makes cut gaskets in various shapes and sizes without the need for costly cut gaskets. 8oz.Retains flexibility and oil resistance propertiesResists strong vibrations and common fluidsUse it on rigid or flexible flangesTemperature ranges: -65F to 400F continuous