TREMproof 250GC

Single-Component, Rapid Curing, Fluid-Applied Elastomeric Waterproofing Membrane

TREMproof® 250GC is a rapid-curing, high-solids, VOC compliant modified polyurethane waterproofing membrane. It can be applied to damp and green concrete. TREMproof 250GC is a one-part moisture-curing elastomer available in three viscosities: Self-Leveling (SL), Roller (R) and Trowel (trowel intended for detailing work only).

Basic Uses
  • TREMproof 250GC is designed for use on backfilled walls, split slab applications, planters and submerged conditions.

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FAQ
  • What applications are TREMproof 250GC suitable for?

    TREMproof 250GC is suitable for backfilled walls, between slab and planter applications. TREMproof 250GC may also be used in non-potable water storage tanks.

  • What viscosity grades are TREMproof 250GC available in?

    S/L = Self-Leveling, R = Roller Grade, and T = Trowel Grade.

  • Can TREMproof 250GC be applied in cold weather below 40°F (5°C)?

    TREMproof 250GC may be applied at temperatures below 40°F (5°), however, all substrates must be clean, dry and frost-free.  It is Tremco’s best recommendation to apply products when substrate and ambient temperatures are at 40°F (5°) and rising. Please note the following when applying these products at temperatures below 40°F (5°).

    Special Note: TREMproof 250GC can freeze while in the pail but it will make it very difficult to apply to the substrate and will significantly increase cure times.

  • Do TREMproof 250GC require a protection course?

    TREMproof 250GC requires a protection course.  A TREMDrain drainage course may be an acceptable substitute or used as an add-on. 

  • What is the advantage of combining a drainage mat with a below-grade waterproofing membrane?

    Use of a drainage mat reduces hydrostatic head pressure, affords protection to the membrane and better directs water to the perforated foundation drainage system. Combining a drainage mat with a Tremco below-grade waterproofing membrane typically qualifies for extended warranties. 

  • What ASTM specification does TREMproof 250GC meet?

    TREMproof 250GC meets or exceeds all minimum performance requirements of ASTM C 836.

  • How long does the concrete have to be cured before TREMproof 250GC can be applied?

    TREMproof 250GC only requires 24 hours following the removal of concrete form work.

  • What is the typical minimum dry mil thickness requirement for TREMproof 250GC?

    60 mils.

  • Can TREMproof 250GC be sprayed?

    Spraying of TREMproof 250GC is not recommended.  If a sprayable membrane is preferred or required, TREMproof 260 may be a suitable alternative. Please consult with Technical Service.

Projects using TREMproof 250GC

Harrisburg, Pennsylvania

Pennsylvania Capitol East Wing

After continual exposure to the elements over the years, the sheet-applied waterproofing system below the paver and pedestal system had begun to fail at its numerous seams and moisture had begun infiltrating the occupied spaces.

Brantford, ON

City of Brantford

A new water pumping station and holding reservoir needed to be up and running quickly to service an industrial park area that was experiencing tremendous growth.

Portland, OR

The Cambridge

Steep grades between buildings with landscaped and paved areas and slab over occupied spaces created difficult conditions, requiring solutions to a variety of construction challenges and particular attention to transition details.