Installation Guide

For use as a mortar
• For setting most ceramic, porcelain and quarry tiles,
acid-resistant floor brick, pavers and natural-stone tile***
• For the installation of moisture-sensitive natural
stone and their agglomerates. When setting light-
colored marble, which can be stained by epoxy, use
white Granirapid
®
, white Ultraflex
™
RS or white
Ultracontact
™
RS or white Ultraflex LFT
™
Rapid.***
• For interior/exterior residential and commercial wall,
floor and countertop installations
• For installations in areas subject to high water use or
submerged conditions (such as gang showers, pools,
spas and fountains)
• For industrial, commercial and institutional installations
requiring Chemical Resistance, contact MAPEI’s Technical
Services Department.
*** Marble, granite and slate are products of nature made
from a vast combination of minerals and chemicals that
may cause the material to behave or react in a manner
beyond our control. Likewise, we do not have control
over any of the materials or processes used in the
manufacturing of agglomerates. Therefore, determine
the suitability of all the materials before proceeding with
the installation. To ensure desired results, a mockup
installation is required before the actual installation.
LIMITATIONS
For use as a grout
• Joint width should be between 1/16" and 3/8" (1,5 and
10 mm).
• Do not use for grouting white or translucent marble.
• Do not use in areas subject to excessive heat. Once
cured, Kerapoxy CQ will resist temperatures up to 212°F
(100°C).
• When used as a grout on exterior installations, color
variations may occur over time, especially with lighter
shades due to ultraviolet rays or environmental
contaminants.
Note: Some types of glazed ceramic tiles, marble and granite
as well as marble agglomerates can be permanently stained,
scratched, dulled or damaged when grouted with pigmented,
sanded and epoxy grout formulas. Take all the necessary
precautions to ensure that the marble, granite or tiles are
compatible with colored grouts. To determine the suitability
of the product with colored and/or sanded grouts, check the
tile or marble manufacturer’s literature and test grout on a
separate sample area before grouting.
For use as a mortar
• Do not install over substrates containing asbestos.
• Do not exceed 1/4" (6 mm) in epoxy mortar thickness
under the tile.
• Do not apply over particleboard, presswood, oriented
strand board (OSB), Masonite, chipboard, Lauan,
gypsum floor-patching compounds or similar
dimensionally unstable substrates.
• Do not use for setting white or translucent marble.
• Do not install over peel-and-stick crack-isolation
membranes or cutback adhesive residue.
SUITABLE SUBSTRATES
For use as a mortar
• Fully cured concrete (at least 28 days old)
• Cement block and brick masonry
• Cement mortars and leveling coats
• Exterior-grade plywood (interior residential floor and
countertop applications in dry areas only)
• Cement backer units (CBUs)
• Existing ceramic tile
• Cement and epoxy terrazzo
Consult MAPEI’s Technical Services Department for
installation recommendations regarding substrates and
conditions not listed.
SURFACE PREPARATION
The temperature of the substrate or tilework must be between
60°F and 90°F (16°C and 32°C) while grouting for best
results. For proper curing, maintain this temperature range
for 72 hours after application.
For use as a grout
• The application of a grout release over certain types
of porcelain or textured surface tiles or stone may be
advantageous where a fine surface porosity might trap
fine cement particles or color pigments. Seek the advice
of the tile or stone manufacturer and site-test (mock
up) on separate samples before grouting.
• Before grouting, make sure that the tiles or stones are
firmly set and that the adhesive or mortar is completely
dry.
• Remove all spacers, pegs, ropes and strings.
• Grout joints must be clean and free of standing water,
dust, dirt and foreign matter. Remove excess adhesive
or mortar from the joint area so that 2/3 of the tile depth
is left available for grouting.
• Clean the tile or stone surface to remove dust, dirt,
mortar, adhesive and other contaminants that may
cause grout discoloration.
For use as a mortar
• All substrates should be structurally sound, stable, dry,
clean and free of any substance or condition that may
reduce or prevent proper adhesion.
See MAPEI’s “Surface Preparation Requirements” document
in the Reference & Installation Guides section of the Tile &
Stone Installations Systems page on MAPEI’s Website.
Kerapox
y
®
CQ
Kerapoxy
®
CQ