Dynatex black RTV silicone gasket maker is a paste-like, one-component material, which cures to a tough, rubbery solid upon exposure to moisture in the air. Formulated for gasket making applications. Sensor safe and manufactured to meet OEM specifications. Makes instant, leak proof gaskets for all engines, drive train equipment, and related components. Resists oil, water, anti-freeze, and transmission fluid. Works on all vehicles. Oxygen sensor safe, low volatile. Makes instant leak-proof gaskets. Resists oil, water, anti-freeze and transmission fluid. Remains flexible. Makes any size or shape gasket instantly. Applicable for valve covers, oil pans, intake manifold end seals, timing covers, thermostat housings, differential covers and more. Suggestions of uses should not be taken as inducements to infringe any patents. ISO Certified.