Loctite 37469 Hi-Temp RTV Silicone Gasket Maker Sensor-Safe Red 80ml Tube

The Loctite 37469 Hi-Temp RTV Silicone is a one-part, room-temperature-vulcanizing (RTV) silicone sealant and gasket maker specially formulated for high-temperature resistance and use on oxygen sensor-equipped engines. Dispensed from a convenient 80ml tube, this sensor-safe red silicone delivers a reliable, flexible seal on a wide range of automotive and industrial surfaces including stainless steel, aluminum, and other metals.

Key Features:

• Sensor-Safe Formula: Will not foul or damage oxygen sensors when fully cured, making it safe for modern fuel-injected engines
• Extreme Temperature Resistance: Withstands intermittent temperatures from -75°F to 600°F (-59°C to 316°C)
• Flexible & Durable: Absorbs shock and vibration while maintaining a strong bond; resists shrinking, cracking, and hardening over time
• Fluid Resistant: Resists automotive and shop fluids, oils, water, grease, and weather
• Fast Curing: Tack-free in just 1 hour; reaches full strength in 24 hours
• Wide Fastener Gap Fill: Effective on gaps from 0.08" to 0.5" (2.2mm to 12mm)
• Cross-Reference: Also known as Loctite 492001 / PN 079340374690

Typical Applications:

• Valve covers
• Oil pans
• Timing covers
• Water pumps
• Thermostat housings
• Transmission pans
• Intake manifolds
• Industrial furnaces
• Hairline crack repair

For best results, ensure mating surfaces are clean, dry, and free of oil and grease before applying a continuous bead at a 45° angle. Assemble parts immediately while the silicone is still wet, then allow to cure fully before returning to service.