J-B Weld™ Ultimate Black Silicone is a high-performance RTV gasket maker engineered for maximum oil resistance, flexibility, and high-temperature durability in automotive and mechanical applications.
High Heat Resistance: Withstands temperatures up to 371°C (700°F) intermittently.
Maximum Oil & Petroleum Resistance: Ideal for sealing components exposed to engine fluids.
High Flexibility: Prevents cracking, shrinking, and leaks, even under movement and vibrations.
Sensor Safe & Weather Resistant: Suitable for modern automotive systems.
Versatile Applications: Perfect for oil pans, valve covers, transmission pans, and high-heat components.
Durable & Easy Application: Forms a strong, waterproof, and weatherproof seal after curing.
Designed for long-lasting, high-temperature, and oil-resistant applications in automotive and industrial repairs.