Technical Specifications

4. TECHNICAL DATA (Cont.)
ProSpec
®
Polymer-Modified Stone Veneer Base Coat has been
tested under laboratory conditions to meet or exceed the
following performance standards:
• Meets or exceeds requirements of ASTM C-270 Table 2 for
Type S and Type N Mortar
• Meets or exceeds requirements of ASTM C-1384 Standard
Specification for Admixtures for Masonry Mortars
Packaging
• Gray: 50 lb. (22.7 kg.) bag – Product #120442
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
Refer to selected stone manufacturers installation instructions
for more complete instructions. Install in accordance with all
local building code provisions and applicable ASTM standards.
• Surfaces must be clean and free from dirt, loose particles,
wax, sealers, curing compounds, paint, efflorescence,
grease, and any foreign materials that could inhibit adhesion.
Any concrete or masonry surfaces that have been painted,
sealed, or treated must be cleaned back to the original
surface.
• Surfaces must be plumb and true with square corners, free of
movement, and structurally rigid and sound enough to
support the veneer finish.
• For best results all materials should be conditioned to 40°F-
80°F (4°-27°C) 24 hours prior to installation.
• For all substrates other than concrete or masonry, apply
ProSpec
®
Moisture Barrier to the substrate prior to
application of Polymer-Modified Stone Veneer Base Coat.
• For sheetrock, wallboard paneling, plywood, or other rigid
wood-related sheathing, install a 2.5-3.4 lb. or heavier
diamond mesh expanded metal lath. A galvanized lath should
be used for exterior applications or interior wet areas.
Note: It is the responsibility of the installer/applicator to ensure the
suitability of the product for its intended use.
Mixing
1. Use cool, clean, potable water in the range of 50º-80ºF (10º-
27ºC) for mixing. Always use clean tools and mixing
containers. Mix with water only, no bonding additives.
2. For best results, use an electric drill with paddle mixer or
mechanical batch mixer to ensure homogeneity and
workability. Avoid high-speed mechanical mixing which can
entrap air into the mixture. Hand mixing mortar is not
recommended
3. Add just enough dry mix to the liquid, begin with 3.25 qt. (3.1
L) water per 50 lb. (22.7 kg) bag. Add additional water
sparingly up to 4.25 qt. (4.0 L) total, while mixing 3-5
minutes. Too much water will cause reduced strength.
Mortar should be a firm, uniform, lump-free consistency,
workable to be trowelable, and stiff enough to retain ridges
and peaks when troweled on a horizontal or vertical surface.
4. Let mortar slake/rest for 5 minutes, Remix for 2 minutes and
use. Do not add additional powder or liquid after slaking, as
this may cause shrinkage and poor bonding. Stir occasionally
to keep fluffy. Maintain water and mixing time consistency
among batches.
5. Bucket life is approximately 1 hour, at normal temperatures of
70°F (21°C). Warmer temperatures will reduce the bucket life.
Do not mix more product than can be placed in 1 hour. Mortar
shall be used and placed in final position within 1 hour after
initial mixing or discarded at that time.
Application
Apply only to surfaces that are frost free and between 50°-90°F
(10°C-32°C) within 24 hours of application and 72 hours
thereafter. Do not apply in direct sunlight on hot, windy days, or
when rain is expected within 24 hours.
• Refer to selected stone manufactures installation instructions
for more complete instructions.
• Apply a ¼-½ in. (6-13 mm) thick coating, pressing the mortar
into the secured metal lath. Lath should remain flat while
completely and evenly embedded by the Polymer-Modified
Stone Veneer Base Coat.
• While the mortar is pliable, within approximately 20-30
minutes, use a notched trowel to rake horizontal grooves,
creating a texture for the veneer units to grab on to.
• Allow the base coat to cure for a minimum of 24 hours before
installing the veneer units. Refer to ProSpec
®
Heavy-Duty
Stone Veneer Mortar (Step 2 in ProSpec
®
Stone Veneer
System) for proper installation of stone veneer units.
Clean up
• Clean all tools with soapy water before mortar dries.
Limitations
• Install in accordance with local building codes and applicable
ASTM standards.
• Freshly poured concrete or masonry substrates must be cured
a minimum of 7 days prior to the application of Polymer-
Modified Stone Veneer Base Coat.
• Individual stones should be less than 7 lbs. (3.8 kg) each.
• Prevent work from occurring on the opposite side of walls to
which the stone veneer is being applied within 48 hours
during and after the installation.
• Follow stone veneer unit manufacturers instructions for layout
and installation techniques.
Curing
Allow 24-36 hours minimum cure time. Strength will increase
over the following 28 days. If conditions are very hot, dry, or
windy, curing with a gentle mist of water will help prevent prem-
ature drying and improve mortar strength. A drape of plastic
over the wall will help retain moisture; if the surface begins to
appear dry, remove the plastic, mist/moisten the surface and
replace the plastic.
2
Data Sheets are subject to change without notice. For the latest version, check our website at www.tccmaterials.com