Waterproofing and Crack Prevention Membrane


TEC® Skill Set™ Waterproofing and Crack Prevention is proven to protect against water damage and tile cracking when used before tile installations. Forms a smooth, monolithic, watertight surface over walls, floors and ceilings and stops in-plane cracks up to 1/8". Use for residential and extra heavy commercial applications.

  • Ready to use
  • Mold and mildew resistant
  • Interior/exterior 
  • May contribute to LEED certification project points


1ga waterproof crack membrane
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TEC® Skill Set™ Waterproofing and Crack Prevention Membrane Product Info


TEC Skill Set Waterproofing and Crack Prevention Membrane forms a smooth, monolithic watertight surface over walls, floors and ceilings. TEC Skill Set Waterproofing and Crack Prevention Membrane stops in-plane cracks up to 1/8" (3 mm) wide at the subfloor from telegraphing through to ceramic and stone tile. Use for residential to extra heavy commercial applications. Exceeds ANSI A118.10 Specifications for Waterproofing Membranes and ANSI A118.12 Specifications for Crack Isolation Membranes.


Key Benefits and Features

  • Ready to use
  • Mold and mildew resistant
  • Interior/exterior
  • IAPMO approved


1 gallon (3.78 L) plastic pail    Product #70-3264-5021


One gallon covers approximately 50 sq. ft. (4.65 m2)


Suitable Substrates

Recommended for use over the following clean, dry, structurally sound and unpainted surfaces:

  • Concrete (minimum 3 days old), cured mortar beds and masonry (interior or exterior)
  • Gypsum wallboard (interior), cementitious backer units (CBU or cement board. Interior or exterior.)
  • APA Grade Trademarked Exposure 1 Plywood [CDX or better; two layers, 11/8" (28 mm) total minimum thickness, interior floors only]
  • Existing ceramic tile, VCT or non-cushioned sheetgoods provided they are single layer only and well bonded to a substrate approved for tile (interior)
  • Adhesive residue (except tacky or pressure-sensitive adhesive)
  • Cold rolled steel


Store unopened containers in a cool, dry location out of direct sunlight and protected from weather. Product must be kept at temperatures of 40°-90°F (4°-32°C). Keep from freezing.


Shelf Life
Maximum of 2 years from date of manufacture in unopened package.


Not for use as a final wear surface. Do not apply over wet areas. Do not use over dimensionally unstable substrates such as particle board, pressboard, lauan plywood, oriented strand board, waferboard, tempered hardboard (e,g, Masonite), fiberglass or single layer wood floors. Do not use in areas subject to hydrostatic pressure from beneath the membrane. Avoid inhaling dust if abrading product.


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 Waterproofing and Crack Prevention Membrane
Description ANSI A118.10 Requirement Typical Results
Shear Strength    
7-Day 50 psi (.34 MPa) 160 psi (1.09 MPa)
7-Day, Water Immersion 50 psi (.34 MPa) 105 psi (0.72 MPa)
4-Week 50 psi (.34 MPa) 180 psi (1.23 MPa)
12-Week 50 psi (.34 MPa) 200 psi (1.37 MPa)
100-Day, Water Immersion 50 psi (.34 MPa) 220 psi (1.50 MPa)
Fungus Resistance Shall not support mold growth Passes
Seam Strength 8 lb./inch width 8.1 lb./inch width
(1.4 kg/cm)
Breaking Strength Minimum 170 psi (1.17 MPa) 200 psi (1.37 MPa)
Dimensional Stability Maximum 0.7% length change < 0.4% length change
Waterproofness No visible water penetration
after 48 hours
Tested in accordance with American
Standards for Load Bearing, Bonded,
Waterproof Membranes for Thin Set
Ceramic Tile and Dimension Stone
Installations—ANSI A118.10
Description ANSI A118.12 Requirement Typical Results
Point Load Minimum 1000 lb. load
without cracking tile
Shear Deflection
(Movement Before Shear)
Standard Performance Min. 1/16" (1.5 mm)
High Performance Min. 1/8" (3 mm)
High Performance
Crack Resistance Test Standard Performance Min. 1/16" (1.5 mm)
High Performance Min. 1/8" (3 mm)
High Performance
Additional Tests Test Method Typical Results
Accelerated Test for
Fungal Defacement
ASTM D-5590 Passed with no
growth and 10 mm
zone off inhibition.
Elongation ASTM D-751 1400%
Tensile Strength ASTM D-751 95 psi (0.65 MPa)

Physical Properties

Physical State Liquid: Styrene Butadiene Rubber Emulsion
Waterproofing Mesh: Non-hazardous Fibrous Mesh
Color Cured: Yellow
Odor Cured: None
Tile Installation Time 3-4 hours after membrane application. See CURING
[at 70°F (21°C)] section for more information.
Foot Traffic Rating (ASTM C627) Residential to Extra Heavy Commercial
(depending on substrate)
Service Temperature Rating -20°F (-29°C) to 320°F (160°C)
VOC 6.1 g/L
VOC (less water) 9.56 g/L
Freeze/thaw Stability of Liquid 1 cycle


Mesh Application (Flashing)
Flashing with TEC Waterproofing Mesh for common problem areas like; inside corners, outside corners, anywhere vertical surfaces meet horizontal surfaces; or anywhere dissimilar materials meet is optional.

To accomplish flashing, first pre-coat the substrate intersections 4" (100 mm) on each side. Then fully embed the 6" (152 mm) wide waterproofing mesh in both directions into the pre-coated areas with a 3" (75 mm) overlap on each side. Allow to dry (approximately 30 to 45 minutes) before full application of membrane.


Membrane Application
Clean substrate from dust with a damp sponge and install membrane right away. For crack isolation apply one coat 50 mils thick. For waterproofing installations, membrane must be applied in two 25 mils thick coats over the entire surface. Using a 1/4"-1/2" (6-12 mm) nap roller or 3/16" x 5/32" (4.8 x 4 mm) V-notch trowel, apply a continuous, even film with overlapping strokes. Make sure there are no voids, bubbles or breaks in the membrane after cured. Apply first coat at 25 mils wet thickness measuring periodically with a wet film thickness gage. Let it dry for 1 hour. Apply a second 25 mils thick coat at right angle to the first in order to fill the imperfections and pinholes. If trowel used, smooth out the membrane ridges with a flat side of the trowel immediately after the application.


NOTE: If water testing is desired/required prior to tile installation, allow membrane to cure at least 24 hours or when color is changed from milky yellow to dark yellow. If chalk lines will be used for tile layout smooth out the surface of the membrane with a flat side of the trowel when membrane is still wet.


TEC Skill Set Waterproofing and Crack Prevention Membrane is typically ready for tile application in 3-4 hours. In all cases, care should always be taken to not gouge or otherwise disturb or damage the integrity of the cured membrane. Install tile using any TEC Skill Set latex-modified mortar. Cure times based on 70°F (21°C) and 50% RH. Colder temperatures, higher humidity or green concrete (not fully cured) will extend cure times.


Clean tools, hands and excess material immediately (while still fresh) with water. Material that is cured is difficult or impossible to remove.

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

Toll Free: 800-832-9023

TEC® Skill Set™ Waterproofing and Crack Prevention Membrane Safety Data Sheet


 Download TEC® Skill Set™ Waterproofing and Crack Prevention Membrane Safety Data Sheet

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