Installation Guide

VersaBond-LFT RS Rapid Setting Large Format Tile Mortar / TDS-450
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. Maximum allowable deflection: L/360 tile L/720 stone.
See TCNA F150-13 tile installations, TCNA F141-13 and F250-13 for
stone. For questions about proper subfloor installation requirements,
call Custom® Technical Services.
Bonding to Backerboards
As an alternative to an additional layer of plywood, WonderBoard Lite
backerboard may be installed over plywood subfloors for ceramic tile
installations. Refer to TCNA F144-13 tile installations and TCNA F-250-
13 for stone. Call Custom® Technical Services when installing natural
stone over plywood subfloor.
Bonding to Existing Surfacing Material
Resilient flooring or plastic laminates must be well-bonded, as well as
clean and free of all contaminates. Roughen the surface by sanding or
scarifying; rinse and allow to dry. Do not sand flooring that contains
asbestos. For existing well-bonded ceramic tile, mechanically abrade
the surface. Rinse and allow to dry. When sanding, an approved
respirator should be used.
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.
Movement Joint Placement
Movement joints are required for perimeters and other changes of
plane in all installations. 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 and F125A.
Mixing Ratios
Mix 5.5 - 6.0 qts (5.20 L - 5.7 L) clean water per 50 lb (22.68 kg) bag
of mortar.
Mixing Procedures
Mix material by hand or use a low 150-200 RPM speed 1/2" (13 mm)
drill to achieve a smooth, paste-like consistency. Let the mixture slake
or stand up to 5 minutes, but no longer. Stir again and use. Stir
occasionally, but do not add more water. When properly mixed,
troweled ridges will stand without slump.
Curing of Product
Curing time is affected by ambient and surface temperatures and
humidity. Use the following as a guideline. Ready for grout and light
traffic in under 2 hours in temperate conditions; vehicular traffic in 1-3
days. Before exposure to heavy or vehicular traffic, assure assembly is
rated “Heavy or Extra Heavy” per TCNA Service Requirements. As
necessary, use plywood or other load distributing protection when
moving heavy equipment across tiled assembly.
Cleaning of equipment
Clean with water before the material dries.
Storage
Store in a cool dry area.
Health Precautions
This product contains Portland cement and free silica. 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. Do not breathe dust; wear a NIOSH approved
respirator.
Conformance to Building Codes
Installation must comply with the requirements of all applicable local,
state and federal code jurisdictions.
6 Availability & Cost
Location Item Code Size Color Package
USA VBLFTMRSG50 50 lb
(22.68 kg)
Gray Bag
USA VBLFTMRSW50 50 lb
(22.68 kg)
White Bag
Canada CVBLFTMRSG50 50 lb
(22.68 kg)
Gray Bag
Canada CVBLFTMRSW50 50 lb
(22.68 kg)
White Bag
7 Product Warranty
Obtain the applicable LIMITED PRODUCT WARRANTY at
www.custombuildingproducts.com/product-warranty or send a written
request to Custom Building Products, Inc., Five Concourse Parkway,
Atlanta, GA 30328, USA. Manufactured under the authority of Custom
Building Products, Inc. © 2017 Quikrete International, Inc.
When VersaBond® Fortified Thin-Set Mortar is used as a part of a
qualifying full installation system of CUSTOM products, the installation
can qualify for up to a 10 year system warranty. CUSTOM will repair
and/or replace, at its discretion, the affected area of the system. For
more information, find details and limitations to this warranty at
custombuildingproducts.com.
8 Product Maintenance
Properly installed product requires no special maintenance.
VersaBond-LFT RS Rapid Setting Large Format Tile Mortar
Published Date: 9/20/2021