VLW IT Underlayment

VLW IT Underlayment

MIL-PRF-3135, Type III, Class 2, Grade A
MIL-PRF-3135, Type III, Class 2, Grade B

Very Lightweight Underlayment – IT (VLW-IT) is a 100% solids epoxy resin base mixed with a very lightweight aggregate to form a trowel applied decking underlayment for general use under all deck covering materials. This new version provides an easier to trowel application. Due to the rapid cure of VLW IT Lightweight Underlayment, it can be installed with minimum downtime. It can be applied directly to clean metal or steel. It offers every advantage for lightweight filler sloping/leveling compound for quick turnover maintenance and/or repair installations.

Typical Uses:

  • Create slope for drainage
  • Level metal substrate
  • Fairing weld beads


  • Improved Trowelability
  • Lightweight
  • Low-moisture absorption
  • Fast curing


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Order a sample for your project, or get in touch with one of our experienced product and application specialists.