Permatex® High-Temp Red RTV Silicone Gasket Maker – 3 oz P/N 81160 (26BR)

Permatex® High-Temp Red RTV Silicone Gasket Maker (P/N 81160 / 26BR) is a single-component, moisture-curing RTV silicone sealant designed to create durable formed-in-place gaskets (FIPG) for high-temperature mechanical assemblies. It cures at room temperature upon exposure to atmospheric moisture, forming a flexible silicone rubber gasket that resists cracking, shrinking, and hardening during thermal cycling.
This high-temperature gasket maker is commonly used as a replacement for pre-cut gaskets in maintenance and assembly operations. The material provides strong adhesion to metal surfaces and maintains sealing performance under heat, vibration, and mechanical stress. Once cured, the gasket remains flexible while maintaining structural integrity during prolonged operation.
The sealant is engineered for industrial, automotive, and equipment maintenance applications where components operate at elevated temperatures. Typical applications include sealing panels, oven doors, window plates, flues, and high-temperature enclosures, as well as sealing components exposed to motor oil, transmission fluid, antifreeze, and other automotive fluids.
The non-sag red paste formulation allows easy bead application, controlled gap filling, and consistent gasket formation. Its high elongation and tensile strength provide durability in assemblies subject to movement or expansion.
Permatex High-Temp RTV Silicone Gasket Maker is widely used by maintenance engineers, OEM manufacturers, equipment fabricators, and automotive technicians seeking a reliable high-temperature silicone gasket sealant for demanding sealing environments.
Key Selection Proof Points
Temperature resistance: -54 °C to +316 °C continuous, 343 °C intermittent
Chemical type: Acetoxy RTV silicone rubber
Appearance: Red non-sag paste
Specific gravity: 1.05
Hardness: >20 Shore A
Elongation: >350%
Tensile strength: >1.5 N/mm²
Gap fill capability: up to 0.25 inch
Cure profile: Tack-free ~1 hour, full cure ~24 hours
Resistance: Motor oil, transmission fluid, alcohol, antifreeze solutions
Typical applications: formed-in-place gaskets, industrial sealing, high-temperature equipment