Fast-Cure, 100% Solids, Semi-Self-Leveling Polyurethane Sealant

TREMPRO® 638 SSL is a high performance, low modulus, one-component, semi-self leveling polyurethane sealant. The sealant cures to a flexible rubber when exposed to atmospheric moisture.

Basic Uses
  • TREMPRO 638 SSL is specially designed for sealing level or slightly sloped joints and seams in railcar, truck trailer and utility trailer roof and floor assemblies.
  • It can also be used in horizontal joints and seams in architectural panels and pre-engineered buildings.
Product Details, Safety, and Installation
  • 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).