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ARDEX Products

Underlayments

ARDEX K 22 F™

ARDEX K 22 F™

High Flow, Fiber Reinforced, & Self-Leveling Underlayment
Product Quantity 50 lbs
Colours White
Working Time 9 Minutes
Pot Life 9 Minutes
Dry Time 2-3 Hours FT | 24 Hours Install Flooring
SF Or LF 25 SF | 50 SF
Area Or Depth 1/4" Thick | 1/8" Thick
Floor Or Wall Floors
Interior or Exterior Interior
Compressive Strength (PSI) Day1 2200 | Day28 6000
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
  • Installs up to 1 1/4” (3 cm) neat, 2” (5 cm) with aggregate in most applications

  • Levels and smooths interior, above-grade substrates: concrete, gypsum, wood, VCT, existing patching and leveling materials and non-water-soluble adhesive residue on concrete. Excellent for challenging substrates, pour or pump

  • 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: Above-grade; On-ground substrates that have been treated with a suitable ARDEX moisture control system; 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

  • Excellent for challenging substrates, pourable/pumpable

  • Flexural Strength (PSI) ASTM C293: 7 days 900; 28 days 1050

  • Modulus of Elasticity (PSI) ASTM C469: 28 days 3.6 x 106

  • Length Change % ASTM C157: 28 days < 0.09

  • Mix water and powder, pour onto floor, spread evenly, smooth out, (can extend with aggregate, see TDS)

  • 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 • ARDEX T-6 Spiked Roller • cleated athletic shoes with non-metallic spikes

  • APPLICATION GUIDELINES: Pour the mix onto the floor. Spread with the ARDEX T-4 Spreader. Immediately smooth the material with the ARDEX T-5 Smoother. Work in a continuous manner during the entire self-leveling installation. Wear cleated athletic shoes with non-metallic spikes to avoid leaving marks in the liquid. Install at a minimum thickness of 1/8'' (3 mm) over the highest point in the floor, which typically results in an average thickness of 1/4'' (6 mm) or more over the entire floor. To match existing elevations, product can be tapered to as thin an application as the sand in the material will allow. If a true featheredge is needed, ARDEX recommends using ARDEX FEATHER FINISH or other unsanded ARDEX patching material for transitions

  • Aggregate Extension (as needed): Extend the product with aggregate as desired / required (see “Thickness of Application” section on TDS) as follows: 1. Select washed and well-graded pea gravel that is no larger than 1/3 the depth of the intended pour and no smaller than 1/8”. Do not use sand. 2. Mix with water first, and then add 1 part by volume of the selected pea gravel, mixing until the aggregate is completely coated. 3. Note that the addition of aggregate will diminish the workability of the product and may make it necessary to install a neat coat. If a neat coat is needed: 1. Allow the initial application to dry as detailed in Tack Free collumn. 2. Prime the initial application with ARDEX P 51 mixed 1:1 (see “Priming” section on TDS). 3. Install a neat coat as detailed above