CRC Red RTV Gasket 340 - Silicone Gasket Maker - CRC NZ
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CRC Red RTV Gasket 340

Self-Forming Hi Temp RTV Silicone Gasket

Related categories:
Gasketing, Gasketing & Jointing

CRC/Barcode Name Pack Size
Blister Tube 85 g 6
Cartridge 300 g 6

CRC Red RTV Gasket 340 is formulated for heavy duty, high temperature applications with an intermittent service temperature of up to 340ºC.

CRC Red RTV Gasket 340 is a self-forming room temperature vulcanising Silicone that replaces almost any cut gasket, felt, cork, paper, asbestos and rubber gaskets. No gasket sealers are required – the pure silicone rubber forms to any size and shape quickly.

CRC Red RTV Gasket 340 resists migrating caused by thermal cycles, cracking, shrinking and vibration. It is ideal for high temperature, high pressure applications, it will remain flexible and durable.

CRC Red RTV Gasket 340 is NOT recommended for use on copper and brass. Do not use as a head gasket, not suitable for stove pipes or in fireplaces.

Features & Benefits

  • Intermittent service temperature of up to 340°C
  • Makes any size or shape of gasket in minutes
  • Ideal for high temperature high pressure applications
  • Replaces most gaskets
  • Remains flexible and durable
  • Easy to apply


  • General machinery and automotive gasketing
  • Valve rocker cover
  • Timing chain cover
  • Thermostat housing
  • Transmission pan
  • Side cover plate
  • Water outlet/inlet
  • Water pump cover gasket
  • Intake manifold
  • Oil pan corner seals
  • Differential cover

Application Method

This product has no special approvals properties

Physical Properties & Performance Characteristics

Composition Silicone Polymer
Curing Method Acetoxy
Colour Red
Continuous Service Temperature Up to 260°C
Intermittent Temperature Up to 340°C
Hardness (Shore A) = 18
Tensile Strength = 1.2 N/mm2
Elongation at Break = 300%
Elastic Recovery 100%
Shrinkage 1%
Toxicity / Staining Non-toxic when cured / None
Tack Free Time = 30 minutes
Through Cure 24 hours (3mm bead @ 25°C/50% RH)


No shipping details available at this time


Material Safety Data Sheet

Summary Version Full Version
CRC Red RTV Gasket 340CRC Red RTV Gasket 340


Technical Data Sheet

CRC Red RTV Gasket 340


CRC/Barcode Pack Sizes Available
Blister Tube 85 g, pack size 6
16.00cm H x 4.50cm W x 4.50cm D : 0.10kg
Cartridge 300 g, pack size 6
28.50cm H x 5.00cm W x 5.00cm D : 0.54kg