High Performance, Neutral-Cure Silicone Sealant

TREMPRO® 645 is a high performance, single-component, medium-modulus, neutral-cure silicone sealant. TREMPRO 645 cures to a flexible rubber when exposed to moisture present in the air.

Basic Uses
  • TremPro 645 is specially designed for sealing joints between most nonporous materials such as glass, aluminum, metal and metal alloys.
  • Typical applications include: recreational vehicles, truck trailers and cabs.
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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).