Trowelshield is a high quality, flexible trowel grade version of Rollershield that helps protect approved substrates from incidental water penetration. Trowelshield is easily applied with a trowel to fill larger gaps in approved substrates and is available in five-gallon (19L) pails.
Coverage
Varies greatly depending upon application, 200-230 square feet (18.6-21.4 square meters) at normal thicknesses.
Coverages are estimated and vary
Weight: 60lbs (27kg)
Working Time: 1 hour under normal room temerature and humidity.
Drying Time: 2 hours or more under normal room temperature and humidity - depends upon thickness.
Application/Storage Temperatures: 45F (7C) to 110F (43C)
Shelf Life: 2 years under normal conditions.
Approved Substrates
Exterior gypsum sheathing (ASTM C79)
Dens Glass Gold®
GlasRoc®
FiberBond®
Durock®
PermaBase®
Concrete
Brick
Masonry
Metal Lath
Others approved in writing
Application Procedure
Job Conditions - Air and substrate temperature for application of Trowelshield must be 45°F (7°C) or higher and must remain 45°F (7°C) or higher for a minimum of 24 hours.
Temporary Protection - Must be provided at all times until the Trowelshield has dried.
Surface Preparation - Surface must be clean, dry, structurally sound and free of efflorescence, oil, grease, form release agents, and curing compounds. On previously painted surfaces, all loose, peeling and chalking paint must be removed. Any glossy areas must be sanded. Substrates must be flat and free of fins or planar irregularities greater than 1/4" in 10'-0" (6.4 mm in 3.05 m).
Concrete - Must have cured a minimum of 28 days prior to the application of Trowelshield. If form release agents or curing compounds exist on the surface, they must be removed with a solution of muriatic acid or similar product (with appropriate precautions). Remove any residual acid by flushing with water.
Masonry - If joints are not struck flush, multiple coats may be required. Contact Master Wall for more information.
Sheathing Applications - Sheathing gaps must be less than 1/4" (6.4 mm). For gaps larger than 1/4" (6.4 mm) WeatherStop Tape may be used. Gap wood-based sheathing per manufacturers recommendations, typically 1/8" (3.2 mm) minimum.
Mixing - Thoroughly stir Trowelshield into a homogenous consistency. Do not add water, over mix, or add accelerators or retarders to Trowelshield.
Application - Trowelshield is typically applied to the sheathing joints as part of a Rollershield application, but may be used as a weather-resistive barrier when applied a minimum 1/16" (1.6 mm) thick. Apply Trowelshield using a stainless steel trowel. For moisture protection, Trowelshield/Rollershield must be applied as a continuous barrier with no breaks or skips or as part of a Rollershield water resistive barrier installation.
Joint Treatment-Place and center drywall mesh reinforcing tape over all joints, corners and gaps in the substrate. Immediately embed Trowelshield into the reinforcing mesh and spot fasteners using a trowel or paint brush and allow to dry. Any remaining gaps should be filled with Master Wall Trowelshield.
Wall Treatment-Apply Trowelshield to the wall surface using a stainless steel trowel to a minimum nominal thickness of 1/16" (1.6 mm).
Clean Up
Tools and equipment can be cleaned with soapy water when Trowelshield is wet.
Limitations
Not for use as an exterior finish.
Information contained in this product data sheet conforms to the standard detail recommendations and specifications for the installation of Master Wall Inc. products and is presented in good faith. Master Wall Inc. assumes no liability, expressed or implied as to the architecture, engineering, or workmanship of any project. This information may be concurrent with, or superseded by other applicable documents, such as specifications and details. Contact Master Wall Inc. for the most current product information.
Copyright 2008 Master Wall Inc.
