TotalFlex® Universal Tile Mortar


TEC® Skill Set® TotalFlex® Universal Mortar is a polymer-modified, high-performing mortar ideal for heavy and large format tile in both interior and exterior applications. It provides extended open time, non-sag and non-slump formulation for wall and floor applications. Use in thin-set and medium-bed applications up to 3/4"  with all types of tile sizes. Provides ultimate transfer to the back of the tile, reducing the need to back-butter.

  • Super-grab for large, heavy tile
  • Install all types of tile and stone on walls and floors interior and exterior
  • Excellent bond strength
  • No additive needed - just mix with water
  • Exceeds ANSI A118.4 & ANSI A118.11
  • May contribute to LEED® certification project points
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TEC® Skill Set® TotalFlex® Universal Mortar Product Info


TEC Skill Set TotalFlex Universal Mortar is a high performing mortar ideal for heavy and large format tile in both interior and exterior applications. It provides extended open time, non-sag and non-slump formulation for wall and floor applications.

It can be used in thin-set and medium-bed applications (up to 3/4" (19 mm)) with all types of tile sizes. This medium-bed mortar will provide ultimate transfer to the back of the tile, reducing the need for back-buttering.


Key Benefits and Features

  • Excellent bond strength
  • Hang large, heavy format tile on the wall without slippage
  • Set large, heavy tile on the floor without slump


40 lbs (18.14 kg) plastic bag
White Product #70-7695-3521


Coverage will vary with condition of substrate. Required trowel size will vary with the tile size, type and substrate uniformity. Select the trowel size that will ensure 100% coverage. Figures below are presented only as guidelines.


Trowel Size Approximate Coverage
per 40 lbs. (18.14 kg)
1/4" x 1/4" x 1/4" (6 x 6 x 6 mm)
square notched trowel
91-102 sq. ft.
(8.4-9.5 m2)
1/4" x 3/8" x 1/4" (6 x 10 x 6 mm)
square notched trowel
75-85 sq. ft.
(7.0-7.9 m2)
3/8" x 3/8" x 3/8" (10 x 10 x 10 mm)
square notched trowel
60-68 sq. ft.
(5.6-6.3 m2)
1/2" x 1/2" x 1/2" (13 x 13 x 13 mm)
square notched trowel
45-51 sq. ft.
(4.2-4.7 m2)
3/4" x 9/16" x 3/8" (19 x 14 x 10 mm)
rounded notched trowel
30-34 sq. ft.
(2.8-3.2 m2)


Suitable Substrates
When properly prepared, suitable substrates include:

  • Gypsum wallboard
  • Water resistant gypsum wallboard (greenboard)
  • Cementitious backer units (CBU)
  • Glass mat backer board
  • Cured concrete, cured mortar beds, brick and masonry
  • APA Grade Trademarked Exposure 1 Plywood [underlayment grade or better, two layers, 11/8" (28 mm) total minimum thickness, interior floors only]
  • Existing ceramic tile and natural stone, provided existing flooring is well-bonded to an approved substrate.
  • Vinyl composition tile, asphalt tile, linoleum or non-cushioned vinyl sheet goods (provided existing flooring is well-bonded to an approved substrate)
  • Adhesive residue (except tacky or pressure-sensitive adhesive)


Store in a cool, dry area away from direct sunlight. Do not store open containers.


Shelf Life
Maximum of 1 year from date of manufacture in unopened package.


Not for installing green marble or other moisture-sensitive stone tile; use TEC Skill Set Marble Mortar. Not for use over rubber, strip wood floors, oriented strand board, particle board or lauan plywood. For CDX plywood, use TEC Skill Set Mortar Additive with TEC Skill Set Floor and Wall Mortar. Do not apply over single layer wood floors. Certain natural stone tiles may be affected by mortar shadowing or staining. Test a small area prior to use to determine suitability.


FIRST AID MEASURES: In all cases, seek medical attention if symptoms develop or persist. EYES: Flush with water for 20 minutes. SKIN: Wash with soap and water. IF VAPORS INHALED: Remove to fresh air. IF SWALLOWED: Do not induce vomiting. WARNING! This product contains chemicals known to the State of California to cause cancer, birth defects or reproductive harm. KEEP OUT OF REACH OF CHILDREN. For Medical Emergency Information, call 1-888-853-1758.


This Product Data Sheet has been prepared in good faith on the basis of information available at the time of publication. It is intended to provide users with information about and guidelines for the proper use and application of the covered TEC Skill Set brand product(s) under normal environmental and working conditions. Because each project is different, H.B. Fuller Construction Products Inc. cannot be responsible for the consequences of variations in such conditions, or for unforeseen conditions.

Applicable Standard

TEC Skill Set TotalFlex Universal Mortar
Description ANSI Requirement Typical Results
28 Day Bond Strength ANSI A118.4
Glazed Wall Tile
> 300 psi (2.1 MPa) 490 psi 3.35 MPa)
Porcelain > 200 psi (1.4 MPa) 330 psi (2.25 MPa)
Quarry Tile > 150 psi (1.0 MPa) 385 psi (2.63 MPa)
Sag on Vertical Surfaces ≤ 1/16" (1.6 mm) 0-1/32" (0-0.8 mm)
Open Time at Room Temperature ≥ 50 minutes 80-90 minutes
Adjustability at Room Temperature ≥ 30 minutes 30 minutes
Final Set 9-15 hours 9-11 hours
28 Day Shear Strength ANSI A118.11
Quarry Tile to Plywood
150 psi (1.0 MPa) 220 psi (1.5 MPa)


Physical Properties

Physical State Dry powder
Color Available in white
Pot Life 3 to 4 hours
Initial Cure [at 72°F (22°C)] 16 to 24 hours
Final Cure 21 days
Foot Traffic Rating (ASTM C627) Residential to Extra Heavy Commercial
(depending on substrate)

Surface Preparation
All substrates must be dry, structurally sound with maximum deflection per industry standards of L/360 for ceramic tile installations and L/720 for natural stone installations under all live and dead loads; and be free from oil, grease, dust, paint, sealers or concrete curing compounds. All contaminants should be removed prior to installation of tile. Surface protrusions and tile glazes shall be removed by sanding, scraping or scarifying. After preparation, remove all dust by vacuuming. Note: Vinyl asbestos tile or any substrate containing asbestos shall not be sanded, scored or scarified because of the potential health hazard of breathing dust. Any substrate containing asbestos must be handled in accordance with existing EPA regulations. Contact your local EPA office.


Notes: Expansion joints must be provided in the tile work over all construction, control and expansion joints in the backing and where backing materials change. Follow ANSI A108.01 Section 3.7 Requirements for Expansion Joints.


Maximum variations in all substrates must not exceed 1/4" in 10 ft. (6 mm in 3 m) or 1/16" in 1 ft. (1.5 mm in 0.3 m) from the required plane. For non-level, interior surfaces use TEC® Skill Set™ Self Leveling Underlayment.


For best results, maintain all tiling materials, substrates, room and adhesives at 50°-70°F (10-21°C) for 24 hours before and 48 hours after installation. Avoid breathing dust and contact with eyes and skin. Avoid using high speed mixing, not to exceed 300 rpm, to prevent entraining air. Add powder to liquid for ease of mixing.

In a clean mixing container, slowly add product to 6-6.75 quarts (1.06-1.13 L) clean, cool water. Mix material for 2 minutes to a thick creamy consistency.


Apply mortar using flat side of trowel to promote better substrate contact, then comb in one direction with the notched side of the trowel. Spread only an area that can be tiled while surface is still tacky (typically 20-30 minutes). Press tiles into setting bed, then push in a direction perpendicular to the notched trowel ridges to achieve optimum coverage. Apply mortar in a heavy enough layer so that complete contact (no voids) between mortar and tile is accomplished when tile is positioned. Irregularities in substrate may require "back-buttering" of large tiles to achieve complete coverage and firm support. Periodically remove and check a tile to assure proper coverage. Keep a minimum of 2/3 of the joint depth between tiles for grouting. Open time and tile hand adjustability may vary with job site conditions. Stir occasionally during use to maintain the smooth, creamy consistency of the product. Do not add additional water.


Drying Time
Grouting may be accomplished when tiles are held firmly in place, typically 16 to 24 hours after installation is completed. No traffic is permitted over the tiles prior to grouting. Cold temperatures or high humidity may extend curing time. Unglazed tiles may require sealing prior to grouting so discoloration will not occur. The use of TEC grout products are highly recommended. DesignColor™ Grout mixed with Grout Boost® Stain Resistant Grout Additive or Power Grout™ are available in a wide array of designer colors, these products provide stain resistance, high performance and ease of use.


Clean tools, hands, and excess materials from face of tile, while mortar is still fresh, with warm soapy water.

Technical assistance information is available by calling the Technical Service Helpline.

Toll Free: 800-832-9023


TEC® Skill Set® TotalFlex® Universal Mortar Safety Data Sheet


Download TEC® Skill Set® TotalFlex® Universal Mortar Safety Data Sheet

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