Ardex Waterproofing/Crack Isolation Compound Commercial Kit

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$252.07 to $286.82

Product Details

Product Details

Ardex 8+9 Rapid Waterproofing and Crack Isolation Compound Commercial Kit

Ardex's 8+9 two component waterproofing and crack isolation compound is the best-in-class roll-on membrane for use on all common substrates before tile and stone installation. This cement based product is very easy to use and provides an outstanding bond to mortars.


  • Commercial kit includes: ARDEX 8 (liquid): 3 gallon (11.34 liters) bottle and ARDEX 9 (powder): 27 lb. (12 kg) bag
  • Available in gray and white
  • Ideal for use in showers, kitchens and exterior manufactured veneer stone installations
  • For commercial and residential applications prior to tile and stone installation
  • Tile installation in just 90 minutes
  • Flood test in only 4 hours
  • 1/3 the cost per square foot vs. competitive products
  • 25 warranty on a two-coat application every time
  • IAPMO Certified, ANSI A 118.10

Application Guide

  • Ensure that you have the appropriate tools and the sufficient amount of ARDEX 8+9™ Rapid Waterproofing and Crack Isolation Compound

Coverage (2 coats)

  • Drywall – 300 sq.ft
  • Concrete – 210 sq.ft

ARDEX 8+9 requires a solid substrate that is clean, dry and free of oils, grease, wax, latex compounds, curing compounds, dust and all foreign matter. Do not install below 50°F (10°C) surface temperature.

  • MIX 1 – Caulking Consistency - Mix a small amount of ARDEX 8+9 to a lump-free caulk-like consistency for filling holes, gaps and joints. Always pour liquid into the mixing container first and then the powder. Working time is approximately 45 minutes at 70°F/21°C
  • Crack Isolation - Use MIX 1 to fill around floor or wall penetrations, corner and floor/wall joints and dormant cracks up 1/8” before installing ARDEX SK MESH. The unused portion of the trowel grade MIX 1 mixture can be blended back with the balance of the remaining powder and liquid for use in the next step, MIX 2
  • MIX 2 – Paint able Consistency - Mix ARDEX 9 (powder) with one unit of ARDEX 8 (liquid). For best results, mix with an ARDEX T-2 Ring Paddle and a low speed drill Always pour liquid into the mixing container first and then the powder. Mix thoroughly to obtain a lump-free, pour able mixture. Coat the entire area evenly with a paint roller or brush and allow thorough drying (30 to 45 minutes). A second layer is required to obtain a waterproof membrane, and must be applied at a 90° angle to the first coat
  • Tiles can be fixed onto the second coat of ARDEX 8+9 after one hour at 70°F/21°C. Use ARDEX MICROTEC Thin Set Mortars ARDEX X 77 and ARDEX X 32 ( for stone), ARDEX X 5 or ARDEX X 4 directly onto ARDEX 8+9, all of which are suitable for porcelain, non-porous and glass mosaic tiles. ARDEX X 4 is suitable for tiles for internal applications only
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