TREMproof 250 GC- a single component, rapid curing, fluid applied elastomeric
waterproofing membrane
This video will provide instructions for the application of TREMproof 250GC
cold fluid applied membrane. The video does not replace or represent the
application instructions found on the Tremco website.
Tremco recognizes that site specific conditions, weather patterns, contractor
preferences, and membrane detailing may require deviation or alteration from
these instructions. When such circumstances exist on a project,
Tremco recommends contacting your local sales representative or Tremco
technical services for assistance and approval as required.
This High Solids VOC compliant modified polyurethane waterproofing membrane is designed for
use on backfield walls, split slab applications, planters, and submerged
conditions. Because it's unique formula allows the system to be applied to damp
and green concrete, it expedites construction schedules and reduces
weather delays. TREMProof250 GC is a one-part moisture curing elastomer
available in three viscosities: self-leveling, roller, and trowel.
The following system components are recommended for use with TREMProof 250GC
Dymonic 100 is a high-performance media modulus low VOC UV-stable non
sag polyurethane sealant. This durable flexible sealant offers excellent
performance in moving joints and exhibits tenacious adhesion once fully cured
Typical applications for Dymonic 100 include expansion and control joints
precast concrete panel joints and perimeter caulking.
ParaSeal Paraterm Bar is an aluminum alloy specifically designed to exhibit
excellent holding power. When fastened through pre-cut holes, Paraterm Bar
provides tight straight and extremely long-lived terminations, caulk troughs,
and drip edges. TREMDrain series drainage mats and protection boards come
in a variety of multi composite systems. The TREMDrain series of mats are used with
TREMProof and Paraseal waterproofing membranes serving both as a protection
course and replacement for traditional pipe and stone drainage systems.
Tremco protection courses are an ultra-lightweight, extremely tough
14-ounce protection course for waterproofing membranes in both vertical
and horizontal applications. It is made of non-biodegradable polyester and can
be installed within minutes over a cured membrane to give maximum protection
against backfill, poured slaps and other trades.
TREMProof TRA Sheeting is a protective waterproofing course
that is compounded from a blend of EPDM and SPR
thermostat elastomers. This sheet is reinforced with a high-strength
polyester woven scrim. Tremco Elastomeric is classified as a thermoset material
made of the highest-quality uncured neoprene rubber at a thickness of 60
mils (1.52 millimeters). Tremco Epoxy Primer is a two-component 1:1 primer
used as compatible tie-in to create connectivity between TREMProof
below-grade waterproofing membranes. Before TREMProof 250 GC can be
applied you'll want to ensure that the dry or damp concrete or dry treated
plywood is clean, sound, and free of all contaminants. Concrete slabs should be
light steel troweled, followed by a fine hair broom or equivalent finish.
Any voids, exposed aggregate areas, honeycombs, splatters, ridges, fins and other
projections or depressions which preclude a smooth and level surface
should be addressed. For split slab conditions, follow good drainage
practices to permit unimpeded water to flow to the drain. All penetrations need
to be encased in concrete and solid grouted in place.
Note the following: no flexible pipe or corrugated pipe of any type shall be
used for a through slab penetration. Penetrations shall be spaced a minimum
of two inches apart to allow for detail work around penetration
Sidewalls of expansion joints shall be parallel, smooth, and straight. Block out
if required, per the recommendations of the manufacturer. Expansion joints
running through planters, walls, or at building to deck, need to have a curb to
curb construction approved by Tremco, waterproofing contractor, and architect
and engineer. For detailing, all shrinkage cracks shall be treated with a 30 mil
coating of TREMProof 250GC six inches wide, centered over the crack
Moving structural cracks greater than one sixteenth of an inch will be routed
and caulked with TREMProof 250GC or Dymonic 100 followed by a 30 mil detail
coat of TREMProof 250 GC extending a minimum of three inches on either side of the crack
Expansion joints will be treated in the following manner: install
closed-cell backer rod, caulk the expansion joint with TREMProof 250 GC
or Dymonic 100 followed by a 30 mil detail coat of TREMProof 250 GC
extending three inches (7.6 centimeters) on either side of the joint
Install TRA sheeting or elastomeric sheeting a minimum of six inches on both
sides of the joint, making sure their slack within the sheeting to accommodate
anticipated movement. Fasten the sheeting on both sides using Tremco's
Paraterm Bar. Apply the field coat of Tremco 250GC over the termination
bars and over the sheeting
At all horizontal-vertical junctures and projections, a one-inch cant of
TREMProof 250GCT or Dymonic 100 shall be installed.
For all penetrations
A one-inch cant of TREMProof 250GCT or Dymonic 100 shall be installed
Install a 30 mil detail coat of TREMProof250 GC extending two inches onto the
penetration and six inches (15 centimeters) onto the surrounding substrate
Inside corners shall be treated with a fillet bead of TREMProof
250 GCT or Dymonic 100. Install a 30 mil detail coat of TREMProof 250GC
extending six inches (15 centimeters) on either side of the corner.
Outside corners should have a three-quarter inch
to one inch (18 to 25 millimeter) chamfer
Install a 30 mil detail coat of TREMProof 250 GC extending six inches (15 centimeters)
on either side of the corner vertical or horizontal. TREMProof 250 GC shall be
roller, squeegee, or trowel applied at the rate of 25 foot squared per gallon (0.66
meter squared per liter) to provide a thickness of 60 mils.
The cure rate of TREMProof250 GC
may be accelerated by adding water. Water may be added to
TREMProof 250GC SL only. Water shall be bottled or tap. Add 4 ounces (half a cup)
of water for every five gallon of TREMProof 250GC SL. Mix the material by
producing a vortex close to the surface of the pale and add the water. Following
the addition of water, continue mixing the membrane to evenly disperse the
added water for up to one minute. Exceeding the recommended one minute of
mixing may result in introducing an excessive amount of air to the membrane
Exceeding the recommended four ounce (half cup) of water per 5-gallon pail of
membrane may result in a reduction of working time
TREMProof250 GC waterproofing system should connect with adjacent
waterproofing systems and the air barrier system as applicable
When the same system or compatible materials are used they may overlap.
When connecting to the air barrier system,
make sure the materials are compatible prior to
installation. Contact your local Tremco sales representative or technical
services for complete instructions, including clean up tips, alternate
methods, and common industry application issues, please visit our website at
www.tremcosealants.com