One-Step Trowel-On Membrane* is the latest in the energex®
series of NextGen products. It is a patented* self-gauging trowel-on membrane that acts as both moisture/air barrier and adhesive. One-Step Trowel-On Membrane* produces a level surface of approximately 1.5 mm thickness of membrane and adhesive with standard hand trowel applications and allows simultaneous installation of drainage insulation. This feature makes waterproofing applications fast and easy, saving labor costs of 25% or more in efficient application of drainage insulation over vapor/air barrier membrane.

UsesOne Step Trowel On Membrane* is used as a trowel applied weather barrier/adhesive over Gypsum sheathing, Dens GlassGold / SECUROCK and sound unpainted exterior grade woodbased sheathings such as plywood and non-veneer boards. For use on other substrates, contact energex® for specific written approval. All Joints must be reinforced with a 4” wide strip of ENERMITE 2.5 mesh.
Surface PreparationSurfaces shall not be below 45° F or painted and must be clean, dry, structurally sound and free of grease or oil. American Plywood Association guidelines must be followed to insure proper installation of the wood based sheathings.
ApplicationOne Step Trowel On Membrane* should be applied directly to the substrate using a stainless steel trowel. Integrated orb technology gauges the coating thickness. By trowel tape the substrate joints with Enermite 2.5 Detail Mesh. Upon completion of joint taping, skim (using the integrated orbs as a gauge) the entire substrate field, making sure there are no voids or thin areas on the surface area. The One Step Trowel On Membrane* is tinted to help with this process. While the One Step is wet place the energex® EPS Foam into the coating in a running bond pattern as per the standard details. Allow 3-6 hours of cure time before rasping the foam boards.
MixingNo mixing is required. Add NO Water!
Job ConditionsTemperature for application of One Step Trowel On Membrane* must be 45° For higher and must remain so for a minimum of 48 hours.
StorageOne-Step Trowel-On Membrane* must be stored at 45° F or above in tightly sealed containers out of direct sunlight.
Adhesive Use Notes:One Step Trowel On Membrane* IS NOT SUITABLE for Bonding Isulation Board to Insulation Board
Drying TimeDrying time depends upon the air temperature relative humidity and the porosity of the sheathing. Under average drying conditions (70° F, 55% R.H.), One Step Trowel On Membrane* sets within 3 hours and achieves full cure in approximately seven days. Protect work from rain for at least 12 hours.
Working TimeAfter applying One Step Trowel On Membrane* to the substrate, the insulation board should be immediately attached to the substrate.
Bond StrengthFor ASTM-D987: 50 psi (plywood/plywood substrate failure).
Water Vapor TransmissionCreates a water vapor barrier when installed according to application instructions.
FlexibilityWill accommodate reasonable movement of wood based sheathings due to expansion and contraction without reduction of bond.
Clean UpClean tools with water while One Step is still wet.
Coverage140 square feet per pail.

ProductMethodResults
Tensile StrengthASTM-D412150-200psi
ElongationASTM-D412350-400%
ViscosityASTM-D2393100-104 K.U.
Low Temp. Flex band @ -20°FASTM-D412passes 180°
In Service Temp. RangeASTM-D822-20°F - 200°F
PermeabilityASTM-E96-804.8 perms @ 29 dry mils.
Rate of AirflowASTM-E283Infiltration<0.0001cfm/ft^2 Exfiltration<0.0001cfm/ft^2
Freeze/Thaw StabilityPasses 5 Cycles
Flash PointNone
Solids by Weight69.9%
Solids by Volume60%