Products : Surface Prep : Waterproofing Membranes & Underlayments : RedGard® Crack Prevention and Waterproofing Membrane

RedGard® Crack Prevention and Waterproofing Membrane

Redgard-Waterproofing-membrane RedGard Installation

A ready-to-use elastomeric waterproofing membrane for both commercial and residential tile and stone application. Suited for interior and exterior substrates, RedGard® creates a continuous waterproofing barrier with outstanding adhesion and reduces crack transmission in tile and stone floors. It bonds directly to clean metal drains, PVC, stainless steel and ABS drain assemblies and can be used as a slab-on-grade moisture vapor barrier under all types of floor coverings.

  • Features & Benefits
  • Technical Documents
  • Warranty Information
  • Resources

Key Features

  • Ready to use - Roll it on
  • Quick dry formula - 30% faster drying
  • Listed with IAPMO for use as a shower pan liner

Suitable Substrates

  • Concrete, cement mortar, masonry
  • Cement Backerboard
  • Exterior Plywood and OSB (interior, dry areas only)
  • Exterior Decks - Contact Technical Services
  • Post-Tension Concrete - Contact Technical Services
  • Lightweight Concrete (min. 2000 psi compressive strength)
  • Gypsum-Based cement topping (min. 2000 psi compressive strength)
  • Existing ceramic tile and resilient flooring

Composition & Materials

RedGard® is a liquid-applied elastomeric waterproofing material that cures to form a monolithic membrane.


  • Easy to use and can be applied by roller, trowel or airless sprayer
  • Rated for extra heavy duty service
  • Reduces curing time with quick-dry formula
  • Isolates cracks to 1/8" (3 mm)
  • Suitable for waterproofing pools, spas and water features
  • Meets Uniform Plumbing Code specifications for use as a shower pan liner
  • Obtained the Notice of Acceptance (NOA) for Miami-Dade County


  • Do not apply to surfaces that may drop below 40°F (4°C) within 72 hours of application.
  • Do not apply over wet surfaces or surfaces subject to hydrostatic pressure.
  • Do not use to bridge or cover over existing expansion, control, construction, cold or saw cut joints; use Crack Buster® Pro Membrane for control, cold or saw cut joints.
  • Do not use as an adhesive.
  • Do not use as a wear surface; the membrane must be covered with tile or other permanent flooring.
  • Do not use solvents in conjunction with the membrane


  • 1 gallon (3.78 L) pail
  • 3.5 gallon (13.2 L) pail

Technical Data

Applicable Standards

American National Standards Institute (ANSI) ANSI A108.01, A108.17, A108.13, A118.10 and A118.12 American National Standards for the Installation of Ceramic Tile ASTM International (ASTM)

  • ASTM C627 Standard Test Method for Evaluating Ceramic Floor Tile Installation Systems Using the Robinson-Type Floor Tester
  • ASTM D638 Standard Test Method for Tensile Properties of Plastics

Tile Council of North America (TCNA) TCNA Handbook for Ceramic Tile Installation, TCNA Method EJ171, F125 & F125A


Technical Data Sheet Technical Data Sheet - French Technical Data Sheet - Spanish Material Safety Data Sheet - English Material Safety Data Sheet - French Material Safety Data Sheet - Spanish

Product Warranty

Custom® Building Products warrants to the original consumer purchaser that its product shall be free from defects in material and workmanship under normal and proper usage for a period of one year following the date of original purchase. CUSTOM's sole liability under this warranty shall be limited to the replacement of the product. Some states, countries or territories do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty will not extend to any product which has been modified in any way or which has not been used in accordance with CUSTOM's printed instructions. CUSTOM makes no other warranties either expressed or implied. This warranty gives you specific legal rights, and you may have other rights that vary from state to state or from one country/territory to another.  This warranty is not transferrable.

Warranty Duration

When RedGard® Waterproofing and Crack Prevention Membrane is used as a part of a qualifying full installation system of CUSTOM products, the installation can qualify for up to a lifetime system warranty. CUSTOM will repair and/or replace, at its discretion, the affected area of the system. For more information, find details and limitations to this warranty at

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