Porcelain Mortar


TEC® Skill Set® Porcelain Mortar is a polymer-modified mortar used for installing porcelain or ceramic tiles over a variety of substrates, including plywood. Provides excellent bond strength for residential or commercial installations.

  • No additive needed - just mix with water
  • Interior and exterior use
  • Exceeds ANSI A118.4 & A118.11
  • Excellent bond strength
  • Mixes to a smooth, creamy consistency
  • May contribute to LEED® certification project points
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Terms and conditions

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TEC® Skill Set® Porcelain Mortar Product Info


TEC Skill Set Porcelain Mortar is for use with porcelain and ceramic tiles. Mixed with water, it exceeds ANSI A118.4 and ANSI A118.11 specifications. Use interior and exterior.


Key Benefits and Features

  • Best bond strength
  • Bonds to a variety of surfaces, including plywood
  • Mix with water – no additive needed



25 lbs (11.34 kg) plastic bag
Gray    Product #70-6011-3021
White    Product #70-6012-3021

50 lbs. (22.68 kg) plastic bag
Gray    Product #70-6011-3121
White    Product #70-6012-3121


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 Aprox. cov per sf Aprox. cov per sf
  25 lbs.
(11.34 KG)
50 lbs.
(22.68 KG)
3/16" x 5/32"
(4.8 x 4 mm)
V-notch trowel
65-70 sq. ft
(6-6.5 m2)
130-140 sq. ft
(12-13 m2)
1/4" x 1/4" x 1/4"
(6 x 6 x 6 mm)
square-notch trowel
40-45 sq. ft.
(3.7-4.2 m2)
80-90 sq. ft.
(7.4-8.4 m2)
1/4" x 3/8" x 1/4"
(6 x 10 x 6 mm)
square-notch trowel
27.5-32.5 sq. ft.
(2.55-3 m2)
55-65 sq. ft.
(5.1-6 m2)


Suitable Substrates
When properly prepared, suitable substrates include:

  • Uncoupling membrane
  • 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. For non-green marble tile applications, use white thin set mortars. 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 & 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 Porcelain Mortar
Description ANSI Requirement Typical Results
28 Day Shear Strength ANSI A118.4
Glazed Wall Tile > 300 psi (2.1 MPa) > 350 psi (2.4MPa)
Impervious Ceramic Tile (Porcelain) > 200 psi (1.4 MPa) 320 psi (2.2 MPa)
Quarry Tile > 150 psi (1.0 MPa) 375 psi (2.6 MPa)
Sag on Vertical Surfaces ≤ 1/16" (1.6 mm) < 1/16" (1.6 mm)
Open Time at Room Temperature ≥ 50 minutes 50-60 minutes
Adjustability at Room Temperature ≥ 30 minutes 30 minutes
Final Set 9-15 hours 13-15 hours


Physical Properties

Physical State Dry powder
Color Available in white and gray
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 clean, cool, water as specified in the chart below.


Size Water
25 lbs. (11.34 kg) 2.5-3 quarts (2.37-2.84 L)
50 lbs. (22.68 kg) 1.25-1.5 gallons (4.73-5.68 L)


Mix material for 2-5 minutes to a thick creamy consistency, then allow the mortar to stand for 10 minutes. Remix for 1-2 minutes and apply.


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. It may be necessary to "back-butter" 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


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