Installation Guide

VersaBond-LFT RS Rapid Setting Large Format Tile Mortar / TDS-450
4 Technical Data
Applicable Standards
American National Standards Institute (ANSI) — ANSI A108.5, A118.4
and A118.11 of the American National Standards for the Installation of
Ceramic Tile ASTM International (ASTM)
ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile
Installation Systems Using the Robinson-Type Floor Tester
Resilient Floor Covering Institute - (RFCI) Recommended Work
Practices for Removal of Resilient Floor Coverings
Tile Council of North America (TCNA) - TCNA Handbook for Ceramic
Tile Installation, TCNA Method EJ171
Complies with ISO 13007-2
Technical Chart
Property Test Method Requirement Typical Results
Open Time A118.4 ≥ 75 psi at 20
minutes
Pass
4 Week Shear Bond Strength
Glazed Wall
Tile
A118.4 > 300 psi 350-450 psi
(2.41 – 3.10
MPa)
Porcelain Tile A118.4 > 200 psi 350-450
psi (2.41 – 3.10
MPa)
Quarry Tile to
Plywood
A118.11 > 150 psi 175-225
psi (1.21 – 1.55
MPa)
Sag on Walls A118.15 < 0.02 in. (0.5
mm)
Pass
Environmental Consideration
Custom® Building Products is committed to environmental
responsibility in both products produced and in manufacturing
practices. Complete the LEED Product Data Request Form at
custombuildingproducts.com for detailed information based on project
location. Use of this product can contribute towards LEED® v3
certification:
Up to 2 points towards MR Credit 5, Regional Materials
Up to 2 points towards MR Credit 4, Recycled Content
Up to 1 point towards IEQ Credit 4.1, Low-Emitting Materials –
Adhesives & Sealants
5 Instructions
General Surface Prep
USE CHEMICAL-RESISTANT GLOVES, such as nitrile,
when handling product.
Surfaces must be structurally sound. Remove all grease, oil, dirt,
curing compounds, sealers, adhesives or any other contaminant that
would prevent a good bond. Glossy or painted surfaces must be
sanded, or abraded, and stripped of all 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 coarse finish to enhance the bond. Plywood
flooring including those under resilient flooring must be structurally
soundand 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 scarified. Sheet vinyl must be well bonded and stripped of
old finish. Roughen the surface by sanding or abrading, then rinse and
allow to dry. Expansion joints should never be bridged with setting
material. Do not sand flooring materials containing asbestos. Ambient
temperature should be maintained above 50° F (10° C) or below 100° F
(38° C) for 72 hours to achieve proper bond.
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 coarse finish to enhance the
bond. Smooth concrete slabs must be mechanically abraded to
achieve proper bond.
Bonding to Lightweight Cement and Gypsum Surfaces
Lightweight or gypsum based underlayments must obtain a minimum
2000 psi (13.8 MPa) compressive strength. The underlayment must be
sufficiently dry andproperly 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. Surfaces shall be free of all grease, oil, dirt,
dust, curing compounds, waxes, sealers, efflorescence, or any other
foreign matter.
All Lightweight cement or Gypsum surfaces should be primed. with a
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 ft2/gal (7.5 M2/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.
VersaBond-LFT RS Rapid Setting Large Format Tile Mortar
Published Date: 9/20/2021