Mer-Krete Systems Tuff-Flex 442

Mer-Krete Systems

Tuff-Flex 442

Mer-Krete™ Tuff-Flex 442
HIGH STRENGTH FLEXIBLE THIN-SET ADMIX
Designed Specifically For Use
With Vitreous Materials

DESCRIPTION:
Tuff-Flex 442 is a compounded and stabilized latex emulsion for use with Mer-Krete Thin-Sets. The resultant mortar is notched troweled to form a thin mortar bed for porcelain, granite, quarry and glass mosaic, stone and other hard to set materials. When cured these mortars display excellent physical properties in adhesion, resiliency, water and weather resistance, and exceed ANSI A- 118.4 requirements.

USE:
For setting porcelain, quarry, granite, stone, glass mosaics and other materials requiring a high strength mortar. Tuff-Flex 442 develops a strong bond to all common substrates (concrete, masonry, wallboard and plaster) and is ideal for vertical veneers both interior and exterior.

ADVANTAGES:
• Superior bond strength
• Highly flexible
• Adheres to all common sound substrates
• Non-shrinking
• Non-toxic and non-flammable
• Water resistant – will not bleed

LIMITATIONS:
• Cannot be applied or stored in freezing weather. After installation, however, this mastic has excellent resistance to frost damage (freeze-thaw cycling).
• Consult manufacturer for installations over wood.

Quick Links:

Catalog Page(s) (PDF)

CONSIDERATIONS FOR INSTALLATION:
No sealers, curing compounds or coatings shall be used on the substrate. Surfaces shall be left clean. Any contaminants shall be removed prior to application.
The use of back-mounted ceramic or mosaic sheets shall not be permitted for exterior installation, wet areas or swimming pools.
Spread only as much mortar as can be covered while the surface is still tacky. Dusty or dry concrete surfaces should be washed with clean water just prior to commencing work and left uniformly damp (no standing water).
Patching, leveling or areas requiring a mortar bed should be prepared using Underlay-L System.

INSTALLATION:
Work should be performed only by a trained applicator familiar with these products and in strict accordance with manufacturer’s application specifications, abbreviated below:
The proportions of the mix depend on the temperature and humidity. Higher temperatures and drier humidities will require slightly more latex to reach optimum spreading consistency. Generally 11/2 gallons of liquid will wet out one 50 lb. sack of thin-set.
1. When heavier fills are required, use Underlay-L or Underlay-M System. Consult manufacturer.
2. Consult current TCA manual for expansion joint recommendations.
3. Grout or point all joints using a prepared grout mixture blended with 150 Acrylic Latex to bring the mix to a workable consistency.

AVAILABILITY:
Mer-Krete Systems are installed by trained contractors located in several population centers in the U.S.

Tuff-Flex

PHYSICAL & TECHNICAL DATA:
Adhesion in Shear: (ANSI A-118.4)
48 Hours >200 p.s.i.
28 Days >450 p.s.i.
Compressive Strength: >4000 p.s.i.
(28 Day)
Linear Shrinkage: None
Water Absorption: <4%
Temperature Sensitivity:
Low Range 45°F
High Range 100°F
Exceeds ANSI A-118.4 Standards

TECHNICAL ASSISTANCE:
Specification assistance is highly recommended prior to a proposed installation. Contact any Mer-Krete technical representative for recommendations.

WARRANTY:
5 year, 10 year and Limited Lifetime warranties are available. Contact the Customer Service Department for specific warranty information.

Mer-Krete Systems
501 Van Ness Avenue, Torrance, California 90501
(323) 775-2461 / FAX (310) 320-4938
E-mail: info@merkrete.com
(800) 851-6303

© 2007 Mer-Krete Systems, ParexLahabra, Inc. All rights reserved.

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