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ARDEX Products

Underlayments

ARDEX K 40™ RAPID

ARDEX K 40™ RAPID

Rapid, High Flow, Self-Leveling Underlayment
Product Quantity 50 lbs
Colours Grey
Working Time 10 Minutes
Pot Life 10 Minutes
Dry Time 2 Hours Install Flooring (Ceramic, Quarry, Porcelain) | 2 Hours All Other Floor Coverings | 12 Hours Install Wood Flooring Adhesives
SF Or LF 56 SF
Area Or Depth 1/8" Thick
Floor Or Wall Floors
Interior or Exterior Interior
Compressive Strength (PSI) Day28 8000
TF Tack Free
RC Recoat
CG Concrete Guard
CD Concrete Dressing
FT Foot Traffic
LT Light Traffic
DT Dry Through
FC Full Cure
HFT Heavy Foot Traffic (Forklift)
VT Vehicular Traffic
FUT Full Traffic
  • Install (ceramic, quarry, porcelain) flooring: 2 hours

  • Install wood flooring or any adhesives: 12 hours (All others 4 hours)

  • Levels from 1/8” (3 mm) up to 1” (24 mm) thick

  • Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete

  • Other approved, non-porous materials on concrete†: Epoxy terrazzo; non-porous (non-absorbent) cementitious terrazzo; Ceramic, quarry or porcelain tiles; Epoxy coatings; Non-water-soluble adhesive residue; Concrete treated with certain curing compounds

  • Suitable Applications: All grade levels; Dry areas only

  • If ARDEX MC RAPID, ARDEX VR 98 or ARDEX PU 50 will not be installed, dormant cracks and dormant joints can be patched with ARDEX FEATHER FINISH® Self-Drying, Cement-Based Finish Underlayment or similar trowel-applied material in accordance with the technical data sheet. For plywood subfloors, fill open joints with ARDEX FEATHER FINISH or similar in accordance with the technical data sheet

  • Not to be used as permanent wear surface, even when coated/sealed

  • Recommended Tools: ARDEX T-1 Mixing Paddle • ARDEX T-10 Mixing Drum • 1/2” (12 mm) heavy-duty drill (min. 650 rpm) • appropriate measuring bucket • ARDEX T-4 Spreader • ARDEX T-5 Smoother • cleated athletic shoes with non-metallic spikes

  • APPLICATION GUIDELINES: Pour or pump: -mix water and powder, pour onto floor, spread evenly, smooth out, can use spike roller (can extend with aggregate, see TDS).