Ardex® 8+9 Rapid ​Waterproofing and Crack Isolation Compound ​​​​​​​​​​​​​​​​​​​​​​

Ardex® 8+9 Rapid ​Waterproofing and Crack Isolation Compound ​​​​​​​​​​​​​​​​​​​​​​

Two-component, solvent-free, Portland cement and acrylic-based liquid system that produces a flexible waterproof coating to protect substrates from topside side water infiltration. ARDEX 8+9 provides an outstanding bonding layer for ARDEX tile and stone setting materials.

  • #ARD89


  • Ideal for commercial or residential showers, bathrooms and kitchens
  • Now Available in Gray or White
  • Cement on cement for a stronger bond
  • Rapid setting- tile in as little as 90 minutes
  • Crack isolation up to 1/8” (3 mm)
  • 1/3 less cost per sq. ft. than competitors’ products
  • Easy to mix and apply


Convenient kit: 1 gallon (3.78 L) ARDEX 8 / 9 lb. (4 kg) ARDEX 9
Commercial units: 3 gallons (11.34 L) ARDEX 8 / 27 lb. (12 kg) ARDEX 9

Convenient kit: 100 sq. ft. per unit
Commercial units: 300 sq. ft. per unit

Pot life: 45 minutes

Drying time:
Initial coat: 30 to 45 minutes
Final coat: 60 minutes

Flood test: 4 hours after the second coat has been applied