Polished Concrete Systems
Information ARDEX K 521™
ARDEX K 521™ is a pourable, polishable, self-leveling topping for fast-track resurfacing of indoor concrete. ARDEX K 521 can be installed from a minimum thickness of 3/8″ (9 mm) up to a maximum thickness of 2″ (5 cm). Use ARDEX K 521 to provide a polished, “aggregate-exposed” surface. Polishing can proceed in as little as 24 hours.
- A blend of Portland cement, hydraulic cements and specialty aggregate
- Resurface indoor concrete
- Walk on in 2 – 3 hours, polish in as little as 24 hours
- Use for interior floors only
Tested in accordance with ASTM C1708
- Technical Data
Technical Data ARDEX K 521™
Mixing Ratio: 3 3/4 quarts (3.55 L) of water per 50 lb. (22.7 kg) bag
Coverage: 15 sq. ft. per bag at 3/8” (1.4 sq. m at 9 mm)
10 sq. ft. per bag at 1/2” (0.9 sq. m at 12 mm)
Flow time: 10 minutes
Compressive strength (ASTM C109/mod – air cure only): 6,800 psi (476 kg/sq. cm.) at 28 days
Flexural strength (ASTM C348): 1,300 psi (91 kg/sq. cm.) at 28 days
Walkable: 2 – 3 hours (without E 25); 24 hours (with E 25)
Polishable: 24 hours (without E 25); 48 hours (with E 25)
Available Colors: Gray
Packaging: 50 lb. (22.7 kg) net weight bag
Storage: Store in a cool, dry area. Do not leave bags exposed to sun.
Shelf life: 1 year, if unopened
Warranty: ARDEX L.P. Standard Limited Warranty applies.
For complete product technical information, click on the Downloads tab and open the Technical Data download.
- BIM Objects
BIM Objects ARDEX K 521™