High Temperature Silicone Sealant

TREMPRO® 644 High Temperature Silicone Sealant is a one-part, ready-to-use silicone sealant. It has a paste-like consistency and cures to silicone rubber at room temperature.

Basic Uses
  • The paste-like consistency of TREMPRO 644 High Temperature Sealant is easily gunnable and can be applied to vertical and overhead surfaces where use of pourable self-leveling sealants would not be practical.
  • This silicone sealant may be used in thicknesses up to 1/4" (6 mm) for bonding and sealing, joining metals and plastics, and electrical insulation.
  • High temperature situations, such as fireplace frames.
  • Sealing joints between most non-porous materials such as glass, aluminum, metal and metal alloys.
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  • What is the shelf life of your TREMPRO sealants?

    Most of the sealants have a 12-month shelf life based on the manufacturing date and batch numbers from the tubes or cases.

  • Within what temperature range can the TREMPRO sealants be applied?

    Tremco recommends that our sealants be applied at substrate temperatures of 40°F (5°C) and rising to 120°F (49°C).