CRC Red RTV Gasket 340 Cartridge 300g

CRC Red RTV Gasket 340 (300 g cartridge) is a heavy-duty, high-temperature gasket sealant that cures at room temperature to form a flexible, leak-proof gasket in minutes. This self‑forming silicone eliminates the need for pre-cut gaskets or separate sealers, adapting to any size or shape on contact with clean surfaces.

Why this gasket maker stands out

• Intermittent service temperature up to 340°C—handles high heat and thermal cycling without migrating, cracking, or shrinking.
• Formed in minutes—no waiting for pre-cut gaskets; just apply and assemble.
• Replaces most gaskets—adapts to metal and joint irregularities, sealing complex geometries and irregular surfaces.
• No gasket sealers required—pure silicone rubber creates the seal, reducing setup steps.
• Remains flexible and durable under vibration and dynamic loads, maintaining a reliable seal over time.
• Versatile for high-temperature, high-pressure applications across automotive and general machinery.

Ideal use cases and applications

• Valve rocker covers, timing chain covers, thermostat housings
• Transmission pans, side cover plates, water outlet/inlet gaskets
• Water pump covers, oil pan corner seals, differential covers
• Intake manifolds and other metal-to-metal joints in engines and equipment

Practical guidance for best results

1. Ensure all surfaces are clean, dry, and free of oil, grease, and old gasket material before applying.
2. Shake the cartridge well and apply a continuous bead to one surface, then mate the joints and tighten to the recommended specification.
3. Allow the seal to set at room temperature; the gasket will form to the mating surfaces as part of the curing process.
4. Avoid copper and brass surfaces, and do not use for head gaskets, stove pipes, or fireplaces.
5. Shipping note: this item ships from our warehouse; please allow 5–7 business days for delivery.

Specifications and important considerations

• 300 g cartridge
• Intermittent service temperature: up to 340°C
• Formulation: self-forming, room-temperature vulcanising silicone
• Gasket compatibility: replaces a wide range of gasket materials (felt, cork, paper, asbestos, rubber, etc.)
• Surface compatibility: suitable for many metal-to-metal joints in automotive and machinery
• Limitations: not recommended for copper/brass; not suitable for head gaskets, stove pipes, or fireplaces