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ARDEX Products


ARDEX K 520™

ARDEX K 520™

Self-Leveling Concrete Topping
Product Quantity 50 lbs
Colours Grey
Working Time 10 Minutes
Pot Life 10 Minutes
Dry Time 2-3 Hours FT | 24 Hours Seal & Polish
SF Or LF 25 SF | 16.7 SF | 12.5 SF
Area Or Depth 1/4" Thick | 3/8" Thick | 1/2" Thick
Floor Or Wall Floors
Interior or Exterior Interior & Garages
Compressive Strength (PSI) 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
  • ARDEX K 520TM is a self-leveling, topping for fast-track resurfacing, smoothing or leveling of indoor concrete and certain non-porous surfaces. ARDEX K 520 can be installed up to 1” (25 mm) thick neat and up to 3” (7.5 cm) thick with the addition of appropriate aggregate (see Technical Data section for minimum installation thicknesses by application). Use ARDEX K 520 in warehouses, utility rooms and light manufacturing areas to provide a hard, flat, smooth surface that can be sealed. Also use over concrete and terrazzo substrates in areas that require a polished surface

  • Can be installed from 1/4” (6 mm) up to 1” (25 mm) over large areas neat and up to 3’’ (7.5 cm) with the addition of proper aggregate

  • Seal & polish in 24 hours

  • ARDEX K 520 can be installed over concrete that contains in-floor heating; can be used as a polished topping over concrete and terrazzo substrates only

  • Recommended Tools: ARDEX T-1 Mixing Paddle, ARDEX T-10 Mixing Drum, ARDEX T-4 Spreader, ARDEX T-5 smoother, ARDEX MB-5.0 Measuring Bucket [5 quarts (4.73 L) per 50 lb. (22.7 kg) bag], 1/2” (12 mm) heavy-duty drill (min. 650 rpm) and baseball or soccer shoes with non-metallic cleats

  • Under no circumstances should ARDEX K 520 be installed over any joints or any moving cracks. All existing expansion joints, isolation joints, construction joints and control joints (saw cuts), as well as all moving cracks, must be honored up through the topping by installing a flexible sealing compound specifically designed for use in moving joints

  • Priming: In retail, hospitality and other areas where aesthetics are critical, for non-absorbent substrates and for all polishing applications, prime with ARDEX EP 2000TM Substrate Preparation Epoxy Primer. Follow the general recommendations for substrate preparation above, and apply the ARDEX EP 2000 with sand broadcast, carefully following the instructions in the ARDEX EP 2000 technical data sheet. In areas where aesthetics are not critical (warehouses, mechanical rooms, etc.), standard absorbent concrete can be primed with ARDEX P 51TM Primer diluted 1:1 with water in accordance with the technical data sheet. Apply evenly with a soft push broom. Do not use paint rollers, mops or spray equipment. Do not leave any bare spots. Brush off puddles and excess primer. Allow primer to dry to a clear, thin film (min. 3 hours, max. 24 hours). Extremely absorbent concrete may require two applications of ARDEX P 51 to avoid the formation of bubbles and pinholes in the ARDEX K 520. In such cases, make an initial application of ARDEX P 51 diluted with 3 parts by volume of water. Let dry thoroughly (1 to 3 hours) and install a second application of ARDEX P 51 mixed 1:1 with water as stated above