J-B Weld 31314 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant

J-B Weld 31314 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant – World’s Strongest Bond

J-B Weld Red Hi-Temp is a 100% RTV silicone gasket maker & sealant engineered for sealing and bonding flanges that see sustained heat, oil splash, and vibration. It’s designed for higher temperature assemblies where standard silicones fall short. From the package: set time is 1 hour and the seal cures red for easy inspection. Once exposed to ambient moisture, the silicone skins, then cures to a flexible, waterproof seal that won’t shrink or crack. It is sensor safe, oil resistant, and temperature rated for up to 650°F intermittent (up to 550°F continuous)—ideal for exhaust-adjacent components and under-hood repairs. Use it on clean metal or compatible plastic flanges to form in-place gaskets on covers, pans, and housings commonly serviced in automotive bays.

Applications include oil pans, valve covers, exhaust manifolds, water pumps, timing covers, differential covers, drive housings, and even oven doors. The included tapered nozzle lays a controlled 1/8″ bead around bolt holes for a tidy, reliable seal.

J-B Weld 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant At a Glance

• High-temperature silicone: Handles 650°F intermittent / 550°F continuous heat.
• 1-hour set time: Skins fast so you can final-torque and reassemble on schedule.
• Sensor safe, low odor: Suitable near O₂ and other emission sensors.
• Oil & weather resistant: Stands up to petroleum products and heat cycles.
• Cure color red: Visual confirmation of bead placement during inspection.
• Forms in-place gaskets: Conforms to uneven flanges and eliminates paper gaskets.
• Precision application: Tapered nozzle for clean 1/8″ beads around bolt holes.
• Made in USA: Shop-grade quality and consistency.

Markets

• Automotive Repair & Performance – Daily sealing for engines, transmissions, and driveline covers.
• Heavy Truck & Fleet Maintenance – Reliable pan and housing sealing across mixed fleets.
• Powersports & Motorcycles – Compact covers near exhaust and high-heat zones.
• Small Engine & Outdoor Power – Pumps, generators, and mowers exposed to heat and vibration.
• Appliance Service – Oven doors and other high-temp sealing tasks.
• Municipal & Facility Garages – Stock RTV for routine service across varied equipment.
• Trade Schools – Demonstrates correct RTV gasket maker technique.

Technicians pick this red RTV silicone when a flange sits near exhaust heat or sees hot oil. The bead tools easily, skins in about one hour, and cures to a flexible, long-lasting seal on oil pans, valve covers, exhaust manifolds, and timing covers. The sensor-safe chemistry avoids issues with O₂ sensors, while the red cure color provides a quick visual check along the seam. For shops that need a dependable, high-temp gasket maker that fits normal bay timing, J-B Weld Red Hi-Temp keeps leaks in check and rework down.

J-B Weld 31314 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant Features

• 100% RTV Silicone: Forms a durable, waterproof, flexible seal.
• High-Heat Performance: 650°F intermittent / 550°F continuous rating.
• Oil/Petroleum Resistance: Built for engine and transmission environments.
• Won’t Shrink or Crack: Maintains clamp load on uneven metal flanges.
• Sensor Safe: Safe around modern engine management components.
• Simple Procedure: Clean → apply continuous 1/8″ bead (surround bolt holes) → assemble while wet → hand-tighten → after ~1 hour final-torque → remove excess after full cure.
• Made in the USA: Consistent manufacturing quality.

J-B Weld 31314 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant Includes

• (1) 3 oz (85 g) tube of Red Hi-Temp RTV Silicone
• (1) Tapered application nozzle

J-B Weld 31314 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant Specifications

• Type: RTV silicone gasket maker & sealant
• Set (Skin) Time: 1 Hour
• Full Cure: ~24 Hours
• Cure Color: Red
• Temperature Resistance: Up to 650°F (intermittent); up to 550°F (continuous)
• Substrates: Metal (clean, dry flanges)
• Typical Uses: Oil pans; Valve covers; Exhaust manifolds; Water pumps; Timing covers; Differential covers; Drive housings; Oven doors
• Category: Automotive
• UPC: 043425313140
• Country of Origin: USA

Why Customers Select the J-B Weld 3oz Red Hi-Temp RTV Silicone Gasket Maker & Sealant

Crews select this red high-temperature RTV when sealing jobs sit close to exhaust heat or require oil resistance. The formula skins in about an hour, applies cleanly with the tapered nozzle, and cures to a flexible gasket that keeps clamp load on oil pan and valve cover flanges. Its 650°F intermittent rating and sensor-safe chemistry make it dependable for modern engine bays, while the red bead provides clear visual verification during QC. For shops that want consistent, repeatable sealing on high-heat components without waiting all day, J-B Weld Red Hi-Temp delivers.