J-B Weld Hi-Temp Silicone Gasket Maker & Sealant, Red, 85g

The J-B Weld Hi-Temp Silicone Gasket Maker & Sealant is a high-performance RTV (Room Temperature Vulcanized) silicone ideal for creating robust seals in mechanical assemblies exposed to extreme heat. This 85g red sealant cures upon exposure to atmospheric moisture, forming a durable, waterproof bond on most surfaces without shrinking or cracking.

Engineered to withstand continuous temperatures up to 287°C (550°F) or intermittent heat up to 343°C (650°F), it excels in high-stress automotive and industrial applications. Its sensor-safe formulation ensures compatibility with oxygen sensors, while its resistance to weathering makes it suitable for both indoor and outdoor use.

Key Features

• High-temperature resistance (up to 343°C intermittently)
• Forms a waterproof, flexible seal
• No shrinkage or cracking after curing
• Resistant to weathering and vibration
• Sensor-safe for automotive applications

This versatile sealant adheres to metals, plastics, and rubbers, making it indispensable for gasket repairs, exhaust systems, and engine components. Reliable under pressure, it’s a must-have for DIY enthusiasts and professionals alike.