Thurmalox 2655 High-Temp Silicone Caulk

High Temperature RTV Silicone Adhesive/Sealant - Thurmalox 2655 is a one-part, room temperature vulcanizing (RTV) silicone caulk adhesive/sealant for high-temperature industrial applications.
Manufacturer: Dampney Company
SKU: 2655
Thurmalox 2655 is a one-part, room temperature vulcanizing (RTV) silicone adhesive/sealant for high-temperature industrial applications. It cures to a tough, elastomeric rubber upon exposure to atmospheric moisture and retains permanent flexibility from -80F to 550F (-62C-288C) and will withstand intermittent exposures to 650F (343C).
Sold in a 10.3 fl.oz. polyethylene cartridge
Recommended Uses:
Thurmalox 2655 Adhesive/Sealant provides excellent adhesion to most surfaces including: metals, painted surfaces, ceramics, glass, rubber and plastics.
Typical applications include:
  • Sealing hot surfaces of air pollution control equipment to prevent acid dew point corrosion caused by in-leakage of moist ambient air
  • For baghouses, precipitators, access doors, expansion joints, vent and flue connections, duct work, damper seals and test ports
  • Fired heaters, boilers, ovens, windows
  • Prevention of dust and dirt contamination of electrical controls, instruments and motors
  • Stoves, fireplace inserts and flue pipes
  • Formed-in-place gaskets around pipes, valves, process equipment and tanks containing hot liquids
  • Formed-in-place gaskets for compressors, pumps, engines, gear boxes and other machinery


  • 100% silicone rubber
  • Outstanding thermal stability over a wide service temperature range
  • Retains permanent flexibility under stress by heat, radiation and weather
  • Unaffected by weather, moisture, UV radiation and ozone
  • Highly resistant to chemical attack
  • Excellent unprimed adhesion to many materials
  • Will not sag, slump or run upon application
  • Excellent dielectric and insulation properties
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