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ADVANTAGES
Interior use
Bright white
Quick setting
Grout in 4 hours
Freeze thaw stable
Bonds to most surfaces
Suitable for wet areas
Superior adhesion for porcelain tile and stone
Low VOC’s meets LEED (IAQ CR 4.1) requirements
Retains consistency after mixing if kept in closed bucket
Built in anti microbial protection for mold and mildew resistance
Suitable as an adhesive over Mer-Krete’s waterproof membranes
Powder can be transported in the winter without concern for freezing
SUITABLE SUBSTRATES
| Concrete Concrete |
Masonry |
| Cement Mortar Beds |
Cement Plaster |
| Ceramic Tile and Stone |
Brick Masonry |
| Gypsum Wallboard* |
Cement Backer Board** |
*Interior Use Only
** Consult cement backer board manufacturer for installation recommendations and to verify
acceptability for exterior use.
LIMITATIONS
Do not use Mer-Stik below 40ºF (4ºC) or above 95ºF (35ºC). Use caution; do not allow mastic to
freeze for the first 72 hours. Do not soak tiles previous to installation. Mer-Stik must not be used
to apply over asphalt sheeting, vinyl covered wall board, Masonite®, cement asbestos board,
metal, glass, plastic, gypsum mortar beds or other unstable substrates. Improperly cured or wet
plywood, particle board or strip wood are not suitable substrates. Mer-Stik is not recommended
for installations that will be continually wet like swimming pools, fountains and gang showers, and
steam showers, use a Mer-Krete Thin Set mortar. Some dimensional stone tile like green and red
marbles may warp when installed with water based mastic. These water sensitive stone tiles
should be installed with Mer-Krete ProEpoxy. For use of Mer-Stik over additional substrates
or situations not mentioned in these instructions, contact Mer-Krete Technical department.
TECHNICAL DATA
APPLICABLE STANDARDS
Mer-Krete’s Mer-Stik is a unique innovation and currently there are no industry standards for this
new technology. Exceeds ANSI 136.1. Follow ANSI A108.4 for installation.
COLOR
White
PACKAGING
25 lbs. bag. When mixed with water will yield approximately 3 1/2 gallons of Mer-Stik.
SHELF LIFE
12 months when stored off the ground in dry heated area. Protect from moisture. High humidity will
reduce the shelf life of bagged material.
INSTALLATION
SURFACE PREPARATION
All surfaces must be between 40ºF (4ºC) to 95ºF (35ºC) and structurally sound (deflection not to
exceed 1/360 of the span), dry clean and free from oil, grease, wax, paint, old adhesives, sealers
and curing compounds. Any contaminates which inhibit proper bond must be removed. Substrate
preparation should be completed following ANSI A108 AN-2 “General Requirements for Subsurfaces”.
All substrates should be plumb and true, surface deviation should not exceed 1/4" in
10'. Patching, leveling or areas requiring repair should be prepared using Mer-Krete’s
Underlayments. Movement (Expansion) joints should be provided to comply with TCA method EJ 171.
Cementitious Substrates
All concrete substrates should be cured a minimum of 28 days. Smooth steel troweled floors
should be roughed up using mechanical chipping, scraping or shot blasting. Dampen porous or
dry concrete previous to installation of tile. Do not leave puddles or standing water.
Cement Backer Board
Follow cement board manufacturer’s instructions.
MIXING
In a clean container, add approximately 4 1/2 quarts (4.7 liters) of clean potable water. Then add
the contents of the 25 lb. (11.33kg) Mer-Stik adhesive. Mix thoroughly by hand or with a slow
speed mixer to a smooth, thick, trowelable consistency. Use immediately. Do not allow to slake.
Mastic consistency shall be such that when applied with the recommended notched trowel to the
substrate, the ridges formed in the mastic do not flow or slump. During use, stir mastic mix
occasionally. Do not temper with additional water. Do not add latex liquid to Mer-Stik.
APPLICATION
Apply Mer-Stik to the substrate with the flat side of the trowel, with enough pressure to firmly
work into the surface. With a notched trowel, immediately follow with a heavier coat of material
using the appropriate trowel and enough mortar to provide 100% coverage to the back of the tile.
Some extruded or lug back tiles back-buttering of tiles may be required. Do not spread more
mastic then can be covered in 30 minutes or before the mastic skins over. A minimum final bed
thickness of 1/16" is recommended for wall tile. It is advised that during the installation, remove a
tile to insure the mastic has not skinned over and check the tile and substrate mastic adhesive
coverage. Comb the mastic using an appropriate notched trowel in one direction. Place tiles in
mortar, slide back and forth perpendicular to the ridges (NTCA “Trowel and Error” method) to
insure proper coverage. Do not adjust tiles set in mastic after 15 minutes.
CLEANING
Water is all that is needed to remove any uncured mastic from tiles, tools and equipment.
AVAILABILITY
Mer-Krete Mer-Stik is available at leading tile houses and construction distributors. Contact
Mer-
Krete for the name of the nearest dealer.
WARRANTY
5 year, 10 year and Limited Lifetime warranties are available. Contact Mer-Krete technical
department for specific warranty information. Mer-Krete Systems warrants that this product meets
applicable ANSI standards in force at the time of manufacture. Mer-Krete will replace any product
which proves defective due to quality of ingredients used or due to the manufacturing process
itself. The warranty shall apply only if the product is installed and used strictly in accordance with
applicable industry standards, specifications, and instructions provided by Mer-Krete. Mer-Krete
shall not be liable for misapplication, misuse or abuse of the product, application or other event
outside of its control. Replacement of defective product or, at Mer-Krete’s option, refund of the
price of product of any defective item shall be the buyer’s sole remedy under this warranty.
Mer-
Krete shall in no event be liable for any damages in excess of the purchase price of the defective
product. MER-KRETE SHALL IN NO EVENT BE LIABLE FOR ANY CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES.
This warranty constitutes the sole and exclusive warranty given by Mer-Krete Systems in
connection with this product, and Mer-Krete Systems has authorized no person to make or give
any other warranties, or representations, oral or written, on its behalf. IN PARTICULAR, THERE
ARE NO IMPLIED WARRANTIES, INCLUDING WITHOUT EXCEPTION, WARRANTIES,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. No modification of this
warranty in favor of any buyer shall be valid unless given in writing and signed by an officer of
Mer-
Krete Systems.
MAINTENANCE
None required, but installation performance and durability may depend on properly maintaining
products supplied by other manufacturers.
TECHNICAL SERVICES
Mer-Krete Systems maintains technical field representatives available throughout the country.
Call
(800) 851-6303 for the nearest representative.
FILING SYSTEMS
Mer-Krete Architectural Product Catalog and CD Rom.
www.merkrete.com
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