Specification

Surface Prep / TDS-234
5 Instructions
General Surface Prep
Surfaces must be structurally sound, clean, dry and free from
grease, oil, dirt, curing compounds, sealers, adhesives or any
other contaminant that would prevent a good bond. Glossy or
painted surfaces must be sanded, stripped and cleaned of waxes, dirt
or any contaminants. Concrete must be cured 28 days and accept
water penetration. Concrete must be free of efflorescence and not
subject to hydrostatic pressure. Concrete slabs should have a broomed
or brushed finish to enhance the bond. Plywood flooring including
those under resilient flooring must be structurally sound and meet all
ANSI and deflection requirements. For questions about proper
subfloor installation, call Technical Services. Smooth concrete
surfaces, existing glazed tile, terrazzo, or polished stone should be
roughened or scarified. Sheet vinyl must be well-bonded and stripped
of old finish. Roughen the surface by sanding or scarifying, rinse and
allow to dry. Expansion joints should never be bridged with setting
material. Do not sand flooring materials containing asbestos. Ambient
temperature, surfaces and materials should be maintained at a
temperatureabove50°F(10°C)orbelow100°F(38°C)for72
hours.
Bonding to Concrete Surfaces
Concrete or plaster must be fully cured and must accept
water penetration. Test by sprinkling water on various areas of the
substrate. If water penetrates, then a good bond can be achieved; if
water beads, surface contaminants are present, and loss of adhesion
may occur. Contaminants should be mechanically removed
before installation. Concrete must be free of efflorescence and not
subject to hydrostatic pressure. Concrete slabs should have a broomed
or brushed finish to enhance the bond. Smooth concrete slabs must
be mechanically abraded to ensure a good bond.
Bonding to Lightweight Cement and Gypsum Surfaces
Lightweight or gypsum-based underlayments must first be treated
withRedGard®WaterproofingandCrackPreventionMembraneand
must obtain a minimum 2000 psi (13.8 MPa) compressive strength at
the recommended cure time. The underlayment must be sufficiently
dry and properly cured to the manufacturer's specifications for
permanent, non-moisture permeable coverings. Surfaces to be tiled
must be structurally sound and subject to deflection not to exceed the
current ANSI Standards All lightweight concrete and gypsum-
basedunderlaymentsurfacestoreceiveRedGard®mustbeprimed
withproperlyappliedsealeroraprimercoatofRedGard®,consisting
of1partRedGard®dilutedwith4partsclean,coolwater.Mixina
clean bucket at low speed to obtain a lump-free solution. The primer
can be brushed, rolled or sprayed to achieve an even coat. Apply the
primer coat to the floor at a rate of 300 ft/gallon (7.5 M/L). Drying
time depends on site conditions, but is normally less than 1 hour.
Extremely porous surfaces may require 2 coats. At this point,
RedGard®canbeappliedtotheprimedlightweightorgypsumbased
surface. Refer to the individual product data sheet or packaging
directions for application instructions. Expansion joints must be
installed in accordance with local building codes and ANSI/TCNA
guidelines. Refer to TCNA EJ171.
Bonding to Plywood Surfaces
Plywood floors, including those under resilient flooring, must
be structurally sound and must meet all ANSI A108.01 Part
3.4 requirements. See TCNA F150. For questions about proper
subfloorinstallation,callCustom®BuildingProducts.
Bonding to Cutback Adhesive
Adhesive layers must be removed, as they reduce mortar
bond strength to cement surfaces. Use extreme caution; adhesives
may contain asbestos fibers. Do not sand or grind adhesive residue,
as harmful dust may result. Never use adhesive removers or solvents,
as they soften the adhesive and may cause it to penetrate into
the concrete. Adhesive residue must be wet-scraped to the
finished surface of the concrete, leaving only the transparent staining
from the glue. To determine desirable results, do a test bond area
before starting. Refer to the RFCI Pamphlet, Recommended Work
Practices for Removal of Resilient Floor Coverings, for further
information.
Expansion Joint placement
Expansion joints and cold joints, as described in ANSI A108.01,
should never be bridged with setting material. They must be brought
through the tile work and filled with an appropriate elastomeric
sealant,suchasCustom's®100%Silicone.ContactCustom's
Technical Services for the proper treatment of control or saw cut
joints. Refer to TCNA EJ171, F125 & F125A.
Mixing Procedures
Since settling may occur, stir using a low speed (300 rpm) power
mixer; do not over-mix.
Application of Product
Apply with a stiff push broom. Apply a thin, even coat; do not allow
puddling. Allow to dry to a clear film (1 to 3 hours, depending on
ambient conditions and dilution) before applying an appropriate
Custom®selflevelingunderlayment.Highlyporousconcretesurfaces
may require a second coat of diluted primer.
Cleaning of equipment
Clean with water before the material dries.
Storage
Store in a cool dry area. Keep from freezing.
Health Precautions
Contains acrylic emulsion. Wear rubber gloves and eye protection.
Avoid eye contact or prolonged contact with skin. Wash thoroughly
after handling. If eye contact occurs, flush with water for 15 minutes
and consult a physician. If skin contact occurs, wash immediately with
soap and water. Dried material is extremely difficult to remove. KEEP
OUT OF REACH OF CHILDREN. DO NOT TAKE INTERNALLY.
Conformance to Building Codes
Installation must comply with the requirements of all applicable local,
state and federal code jurisdictions.
LevelQuik®LatexPrimer
Published Date: 8/12/2014