Primer 57
Bonding Agent
Primer 57 is a 100% acrylic bonding agent used to prepare surfaces of concrete, masonry, stucco, and exterior gypsum sheathing to help  enhance the bond of Master Wall products or traditional stucco.  It helps to control excessive absorption of stuccos and One Coat Stuccos over highly porous surfaces and improves bond of Master Wall Flashing tapes.  Primer 57 is available in five-gallon (19L) pails and is typically applied with a brush, roller or spray equipment.
Coverage
1000-1200 square feet (74-112 square meters) per pail

Coverage is estimated and varies

Weight:  40lbs (18 kg)

Working Time:  Does not affect normal working times.

Drying Time:  Dries to the touch in 1/2 hour.  Ready to recoat if necessary after 6 hours.  Protect from rain and temperatures less than 40F (5 C) for a minimum of 24 hours.

Application/Storage Temperatures:  45F (7C) to 110F (43C).  Store out of direct sunlight.

Shelf Life:  2 years under normal conditions.
Application Procedure

Job Conditions - Air and substrate temperature for application of Primer 57 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 Primer 57 has dried or is ready for application.

Surface Preparation - Surface temperature must be above 45°F (7°C). 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.

Concrete - Must have cured a minimum of 28 days prior to the application of Primer 57.  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 - must be dry, clean and prepared.  Flush masonry joints are preferred.  Contact Master Wall for more information.

Stucco - Must have be cured. Dry and ready to receive Primer 57.  If additives were used in the stucco, it is recommended that a test patch be made to evaluate bond strength of the Primer 57 to the stucco.

Exterior Gypsum Sheathing-Install and prepare according to accepted practices.  Primer 57 may be reduced with 1 part water to 1 part Primer 57 over gypsum substrates.

Bonding Agent for WeatherStop Flashing Tapes-Clean & Dry

Mixing - Thoroughly stir Primer 57 into a homogenous consistency.  Avoid introducing air into the coating.  Do not over mix. Do not add accelerators or retarders to Primer 57.

Application - Primer 57 can be applied by brush, roller, or airless spray equipment.  When using a roller, a maximum ¾  nap is recommended.  Apply Primer 57 in an even, continuous coat, maintaining a wet edge.  When used as a bonding agent, allow to tackify prior to application of stucco.

Clean Up
Tools and equipment can be cleaned with water when Primer 57 is wet.

Limitations
Primer 57 should not be used as a primer color coat.
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.
Approved Substrates
Exterior gypsum sheathing (ASTM C79)
Dens Glass Gold®
GlasRoc®
FiberBond®
Durock®
PermaBase®
Concrete
Brick
Masonry
Stucco/One Coat Stucco
Others approved in writing
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Copyright 2009 Master Wall Inc.
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Aggre-flex EIFS  Aggre-flex Drainage EIFS  I  Rollershield Drainage EIFS  I  One Coat Stucco (OCS)  I  Insulated Concrete Form (ICF) Coatings  I  Cemplaster (Portland Cement) Stucco  I  Stucco Cement Board Coatings  I  Aggre-flex Commercial Drainage EIFS  I  Uninsulated Finish System  I  QRW1 Drainage EIFS  I  Superior Finishes over Stucco Rollershield LAB