Description
Create durable, high-temperature seals with J-B Weld Hi-Temp Red RTV Silicone Gasket Maker & Sealant. Designed for demanding automotive and mechanical applications, this professional-grade RTV (Room Temperature Vulcanized) silicone forms a tough, flexible, and waterproof seal that withstands continuous temperatures up to 650°F (343°C).
Ideal for replacing or supplementing conventional gaskets, this high-performance silicone cures upon exposure to moisture in the air, creating a long-lasting seal that resists cracking, shrinking, weathering, and vibration. Whether you're working on engine components, automotive repairs, or general mechanical assemblies, J-B Weld delivers dependable sealing performance where heat resistance matters most.
Key Features
-High-temperature RTV silicone gasket maker
-Withstands continuous temperatures up to 650°F (343°C)
-Forms a tough, flexible, waterproof seal
-Resistant to cracking, shrinking, and weathering
-Excellent adhesion to a variety of surfaces
-Ideal for automotive and mechanical repairs
-Helps seal against leaks, moisture, and contaminants
-Easy-to-apply tube format
Built for High-Heat Applications
Engineered for environments exposed to continuous high temperatures, J-B Weld Hi-Temp Red Silicone provides reliable sealing performance for automotive and industrial applications where standard sealants may fail.
Ideal For
-Oil pans
-Valve covers
-Exhaust manifolds
-Differential covers
-Engine housings
-Mechanical assemblies
-Automotive maintenance and repairs
-High-temperature sealing applications
Why You'll Love It
-Creates durable custom gaskets
-Helps prevent fluid and air leaks
-Flexible seal withstands vibration and movement
-Waterproof and weather-resistant after curing
-Suitable for a wide range of automotive repairs
How It Works
Once applied, the RTV silicone reacts with moisture in the air and cures into a strong, flexible gasket material that bonds securely to surfaces while maintaining excellent heat resistance.
Product Specifications
Brand: J-B Weld
Product Name: Hi-Temp Red RTV Silicone Gasket Maker & Sealant
Size: 3oz (85g)
Color: Red
Type: RTV Silicone Sealant
Maximum Continuous Temperature: 650°F (343°C)
Waterproof: Yes
Directions
Ensure surfaces are clean, dry, and free from oil, grease, and old gasket material.
Apply a continuous bead to the desired sealing surface.
Assemble parts according to manufacturer recommendations.
Allow sufficient curing time before exposing to fluids or operating conditions.
Storage
Store in a cool, dry place with cap tightly secured after use.