BA57 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 stucco over highly porous surfaces and improves bond of Master Wall SuperiorFlash and WeatherStop Tapes.


VOC: 5 g/l
Manufacture Locations: 30058 • 77474 • 84651
Recycled Content: 0%

Packaging: 5 gallon (19L) pail

Pail Weight: 40 lbs (18 kg)

Coverage (estimated) Per Pail: 1000-1200 sf (74-112 sm)

Dry to Touch: 1/2 hour @ room temperature

Recoat: 6 hours @ room temperature

Application Range: 40º-110ºF (5º-43ºC)

Shelf Life: 2 years

Approved Substrates

Master Wall Base Coats
Prepared & Base Coated Surfaces of Brick, Concrete, Masonry
Exterior gypsum sheathing
(ASTM C1396, C1177)
Dens Glass Gold®
Gold Bond e2xp®
Util-A-Crete®, ProTEC®, ProGUARD®
Others approved in writing

Application Procedure

Job Conditions – Air and substrate temperature for application of BA57 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 BA57 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 BA57. 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 BA57. If additives were used in the stucco, it is recommended that a test patch be made to evaluate bond strength of the BA57 to the stucco.

Exterior Gypsum Sheathing – Install and prepare according to accepted practices. BA57 may be reduced with 1 part water to 1 part BA57 over gypsum substrates.

Bonding Agent for SuperiorFlash or WeatherStop Flashing Tapes – Clean & Dry

Mixing – Thoroughly stir BA57 into a homogenous consistency. Avoid introducing air into the coating. Do not over mix. Do not add accelerators or retarders to BA57.

Application – BA57 can be applied by brush, roller, or airless spray equipment. When using a roller, a maximum ¾ nap is recommended. Apply BA57 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 BA57 is wet.

Limitations – BA57 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.

Additional Information