Technical Specifications

Packaging
 Gray: 50 lb. (22.7 kg.) bag (BOM #126197)
 White:50 lb. (22.7 kg) bag (BOM #120881)
Shelf Life
12 months from the date of manufacture when stored in the
original, unopened container, away from moisture, under cool,
dry conditions and out of direct sunlight.
5. INSTALLATION
Preparation
Powder and water should be acclimated to room temperatures
of 50°F-80°F (10°C-27°C) 24 hours prior to installation.
 Concrete must be fully cured (28 days minimum), free of
efflorescence, and not subject to hydrostatic pressure or
moisture condensation.
 All surfaces must be stable, solid, and structurally sound.
 Remove all unsound concrete, grease, oil, dirt, paint,
sealers, curing compounds, waxes, old adhesive residue,
and any other foreign materials that will inhibit adhesion.
Mechanical removal is recommended, chemicals often serve
to drive them deeper into the concrete substrate.
Note: It is the responsibility of the installer/applicator to ensure the
suitability of the product for its intended use.
Refer to:
ANSI Standard A41.1 Building Code Requirements for Masonry
ASTM C90 Standard Specification for Loadbearing Concrete
Masonry Units
ASTM C887 Standard Specification for Packaged, Dry, Com-
bined Materials for Surface Bonding Mortar
ASTM C946 Standard Practice for Construction of Dry-Stacked,
Surface Bonded Walls
ASTM E72 Standard Test Method for Conducting Strength Tests
of Panels for Building Construction
ASTM E136 Standard Test Method for Behavior of Materials in a
Vertical Tube Furnace at 75°C
Federal Specification TTP-0035
Job Mockups
The manufacturer requires that when its ProSpec
®
products are
used in any application or as part of any system that includes
other manufacturers’ products, the contractor and/or design
professional shall test all the system components collectively
for compatibility, performance and long-term intended use in
accordance with pertinent and accepted industry standards
prior to any construction. Written documentation of the tests
performed shall be satisfactory to the design professional and
contractor. Test results must include the means and methods of
application, products used, project-specific conditions being
addressed, and standardized tests performed for each proposed
system or variation.
Mixing.
1. Mix only the amount that can be placed in 25-35 minutes.
2. Mortar can be mixed manually in a mortar tub with a shovel
or hoe, in a mechanical mixer, or in a 5-gallon bucket with a
mixing drill attachment. Avoid high-speed mechanical mixing
which can entrap air into the mixture.
3. Optional: For improved durability, strength, and adhesion
when applying over previously coated and non-porous
surfaces it is recommended to use ProSpec
®
Mighty Bond
(sold separately) blended with water. Mighty Bond may be
diluted by up to 50% with water. For extra difficult
restoration or waterproofing projects, it is recommended to
always use the Mighty Bond additive/water blend in place of
water alone.
4. Mix one 50 lb. (22.7 kg) bag of powder with 1 gal. (3.8 L) of
clean, cool, potable water, or Mighty Bond/water blend.
Blending powder into the liquid allows for easier mixing.
Additional liquid can be added if necessary to achieve a
smooth, trowelable consistency. Total liquid used should not
exceed 1½ gal. (5.7 L).
5. Mix 2-3 minutes until a smooth, lump-free consistency is
achieved. Avoid over watering, over mixing, or moving the
mixer up and down during mixing as this will entrap air and
lower the strength.
Note: Elevated temperatures will shorten the working time. Lower
temperatures will delay set times.
Application
 Apply only to surfaces that are frost free and between 50°F-
90°F (10°C-32°C) within 24 hours of application and 72
hours thereafter, and when rain is not expected within 24
hours. Do not apply on hot, windy days.
 Pre-dampen wall surfaces to be repaired with clean water to
saturated surface dry (SSD) condition just prior to application.
If the wall becomes dry before application of product, re-wet
the wall to avoid water being withdrawn from the mixture.
Patching or Filling Holes in Concrete/Masonry Walls and
Stucco Repair
 Surface Bonding Cement CR is ideally suited for patching or
filling holes in concrete or masonry walls, as well as repairing
cracks, or filling openings in stucco walls.
 The use of ProSpec
®
Mighty Bond/water blend is required
when application is made to other surfaces than uncoated
block wall. Install galvanized expanded metal lath to walls that
have been previously painted or coated.
 Apply up to ½ in. (1.3 cm) thickness per layer. Deep repairs
may require applying product in multiple lifts or layers after
initial set between lifts (approximately 2-4 hours), product
should be firm, but not final set. Make sure to dampen the
surface area between applications of product.
 When troweling, be sure to clean the surface of the trowel
often with water and use a “light touch” when finishing the
surface. Do not over trowel.
Surface Finishes
 Surface textures from a smooth finish to decorative stucco-
like relief can be applied with Surface Bonding Cement CR
with a single or multiple-coat application. Often a first smooth
coat of product is applied at ⅛ in. (3 mm) minimum, then a
second coating for the decorative finish using suitable spray
equipment or plasterer’s hand tools is applied 2-4 hours later.
Data Sheets are subject to change without notice. For the latest version, check our website at www.tccmaterials.com
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