Job Conditions - Air and substrate temperature for application of  Rollershield must be 40°F (5°C) or higher and must remain 40°F (5°C) or higher for a minimum of 24 hours.  Provide temporary protection to protect the wall system from damage until permanent flashings, caps and sealants are installed. Store materials within prescribed temperature limits and out of direct sunlight.  Working and drying times are based upon normal room temperature conditions and will vary with temperature and humidity.

Preparation - The substrate must be approved by Master Wall Inc., clean, dry, structurally sound and free of efflorescence, oil, grease, form release agents and curing compounds or anything that would affect bond.  Painted surfaces are not acceptable and must be removed.  Substrates must be flat and free of fins or  planar irregularities greater than 1/4  in 10’-0  (6.35 mm in 3.05m).

        Concrete - Must have cured a minimum of 28 days prior to the application of Rollershield.  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.  

        Brick/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 or Rollershield Flashing Tape may be used.  Gap wood-based sheathing per manufacturers recommendations, typically 1/8  (3.2 mm)         minimum.

Mixing - Thoroughly stir Rollershield into a homogenous consistency.  Do not add water,  over mix, or add accelerators or retarders to     Rollershield.

Application - Rollershield is applied by first treating the joints and fastener locations where sheathing is used, then coating the entire surface using brush, roller, trowel or airless spray equipment techniques.  When using a foam roller, a maximum ¾  (19 mm) nap is recommended.  Apply Rollershield in an even, continuous coat, maintaining a wet edge of approximately 15 mils thickness.  Oriented Strand Board and other porous substrates require two (2) coats of Rollershield.  For moisture protection, Rollershield must be applied as a continuous barrier of 10 mils dry thickness with no breaks or skips, although some areas will appear lighter than others due to the application process.  The   Rollershield application need not look like a painted surface.

Joint Treatment-Place and center Rollershield Mesh over all joints, corners and gaps in the substrate.  Immediately embed Rollershield into the reinforcing mesh and spot fasteners using a paint brush or trowel and allow to dry.  Alternatively apply a thin layer of Rollershield to the joints and embed Rollershield Flashing Tape into the wet mixture and trowel smooth.  Rollershield may be flashed into window, door and other openings using the same techniques.  Any remaining gaps should be filled with Master Wall Trowelshield or Trowelshield and Mesh may be used as the joint treatment.

Wall Treatment-Apply Rollershield to the wall surface using  the foam roller or by spray applying and backrolling to a uniform thickness of 10 mils with no pinholes or voids.