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4237 Latex Additive
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PRODUCT DESCRIPTION LATICRETE 4237 Latex Additive is a specially designed latex additive for use with LATICRETE 211 Powder to make high strength latex thin-set bed up to 1/8" (3 mm) and medium bed up to 5/8" (15 mm) mortars. For installing all types of ceramic tile and natural stone and agglomerates. Also for use […]
LATICRETE 4237 Latex Additive is a specially designed latex additive for use with LATICRETE 211 Powder to make high strength latex thin-set bed up to 1/8" (3 mm) and medium bed up to 5/8" (15 mm) mortars. For installing all types of ceramic tile and natural stone and agglomerates. Also for use with portland cement to make slurry bond coats for mortar beds and with thin set mortars to give improved performance and longer open time.
Used for installation of all types of ceramic tile, brick, stone and agglomerates. LATICRETE 4237 Latex Additive offers the speed and economy of adhesives with the permanent, water resistant dependability of portland cement. Can also be mixed with LATICRETE PermaColor™ Grout for the installation of paper face mounted glass mosaic tile for the one step method.
Superior bond strength—250% greater than ANSI A118.4 (American National Standard Specification for Latex Portland Cement Mortar).
Flexible and shock resistant; rated for extra heavy traffic conditions.
Weather and frost resistant for interior and exterior use in all types of climates.
Proven performance; used in all types of applications for over 50 years.
Safe, economical and easy to use; non-hazardous, non-flammable.
Cement Mortar Beds
Gypsum Wallboard (Interior Only)
Cement Backer Board*
Ceramic Tile and Stone
* Consult cement backer board manufacturer for specific installation recommendations and to verify acceptability for exterior use.
5 US gallon (18.9 ℓ) Pail, 36 per pallet
Factory sealed containers of this product are guaranteed to be of first quality for five (5) years if stored indoors and off the ground at temperatures >32°F (0°C) and <110°F (43°C).
Use LATAPOXY® 300 Adhesive for installing green marble, water sensitive stone and agglomerates and resin backed tile or stone.
For veneer installations using this product, consult local building code requirements regarding limitations and installation system specifications.
Use a white thin set mortar when installing white or light colored natural stone.
Adhesives/mastics, mortars and grouts for ceramic tile, pavers, brick and stone are not replacements for waterproofing membranes. When a waterproofing membrane is required, use a LATICRETE Waterproofing Membrane (see Section 10
Note: Surfaces must be structurally sound, stable and rigid enough to support ceramic/stone tile, thin brick and similar finishes. Substrate deflection under all live, dead and impact loads, including concentrated loads, must not exceed L/360 for thin bed ceramic tile/brick installations or L/480 for thin bed stone installations where L=span length (except where local building codes specify more stringent deflection requirements)
Consult MSDS for more safety information.
During cold weather, protect finished work from traffic until fully cured.
Wait 14 days after the final grouting period before filing water features with water at 70°F (21°C).
Keep out of reach of children.
All surfaces should be between 40°F (4°C) and 90°F (32°C) and structurally sound, clean and free of all dirt, oil, grease, paint, concrete sealers or curing compounds. Rough or uneven concrete surfaces should be made smooth with LATICRETE Latex Portland Cement underlayment to provide a wood float (or better) finish. Dry, dusty concrete slabs or masonry should be dampened and excess water swept off. Installation may be made on a damp surface.
Note: Latex Portland Cement Mortars do not require a minimum cure time for concrete slabs. All slabs must be plumb and true to within 1/4" (6 mm) in 10 ft (3 m). Expansion joints shall be provided through the tile work from all construction or expansion joints in the substrate. Follow ANSI specification A108.01-3.7 “Requirements for Movement Joints: Preparations by Other Trades” or TCNA detail EJ-171 “Movement Joints—Vertical & Horizontal”. Do not cover expansion joints with mortar.
Stir LATICRETE 4237 Latex Additive thoroughly before use.Use approximately 1 gallon (3.8 ℓ) of LATICRETE 4237 Latex Additive to 35 lbs (15.9 kg) of LATICRETE 211 Powder. Place LATICRETE 4237 Latex Additive in a clean plastic pail. Do not dilute. Add LATICRETE 211 Powder to LATICRETE 4237 Latex Additive and mix to a smooth, trowelable consistency. Allow mortar to slake for 5–10 minutes. Adjust consistency if necessary. Remix and apply with the proper sized notched trowel.
Note: For the one-step installation of paper-face mounted glass mosaic tile, mix 3 quarts (2.9 ℓ) of LATICRETE 4237 Latex Additive with 25 lbs (11.3 kg) of LATICRETE PermaColor™ Grout. See TDS 145 "Installation of Glass Mosaic Tile", available at www.laticrete.com for more information.
Apply mortar to the substrate with the flat side of the trowel, pressing firmly to work into surface. Comb on additional mortar with the notched side.
Note: Use the proper sized notched trowel to insure full bedding of the tile. It is essential that enough mortar is used to completely cover the back of the tile with a minimum 3/32" (2 mm) to 1/8" (3 mm) uniform thickness. Spread as much mortar as can be covered with tile in 15–20 minutes. Back butter large tiles >8" x 8" (200 mm x 200 mm) to provide full bedding and firm support. Place tiles into wet, sticky mortar and beat in using a beating block and rubber mallet to imbed tile and adjust level. Check mortar for complete coverage by periodically removing a tile and inspecting bedding mortar transfer onto back of tile.
Grout installation after a minimum of 24 hours curing time at 70°F (21°C). Grout with LATICRETE PermaColor™ Grout, LATICRETE SpectraLOCK® †† PRO Premium Grout, LATICRETE SpectraLOCK PRO Grout, LATICRETE 1500 Sanded Grout or LATICRETE 1600 Unsanded Grout gauged with LATICRETE 1776 Grout Enhancer or with water.
††United States Invention Patent No.: 6881768 (and other Patents)
Cold Weather Note:
The setting of Portland cement mortars and grouts are retarded by low temperatures. Protect finished work for an extended period when installing in cold weather. For faster setting mortar use LATICRETE Thin-Sets with LATICRETE 101 Rapid Latex Admix.
Do not set tile when surface temperature is below freezing or when substrate is frozen.
Hot Weather Note:
The evaporation of moisture in Portland cement mortars is accelerated by hot, dry conditions. Apply to dampened surfaces and protect freshly spread mortar and finished work when installing in temperatures over 95°F (35°C).
Clean tools and tile work with water while mortar is fresh.