SL-312 625°F Black RTV Silicone is developed for the hot running engines found in most domestic and foreign cars. High Temp Black 100% RTV Silicone withstands temperatures from -80 ˚F to + 625 ˚F (-62 ˚C to +329 ˚C) intermittent. Pressure resistance: 5000psi. Makes any sized or shaped gasket immediately. Ideal for timing covers, valve covers, oil pans, intake manifolds, exhaust manifolds and water pumps.