Overlays and Toppings
Products
ARDEX K 521™
Self-Leveling Concrete Topping with Aggregate Surface
- Unique aggregate appearance
- Scratch and indent resistant
- Walk on in 2 - 3 hours, polish in as little as 24 hours
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.
Key Features
- 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
- Dual water ratio
- Use for interior floors only
Standards
Tested in accordance with ASTM C1708
Technical Data ARDEX K 521™
Installation
Mixing Ratio: 3 1/2 or 3 3/4 quarts (3.31 or 3.55 L) of water per 50 lb. (22.7 kg) bag
Coverage: 14 – 15 sq. ft. per bag at 3/8” (1.3 – 1.4 sq. m at 9 mm)
9 – 10 sq. ft. per bag at 1/2” (0.8 – 0.9 sq. m at 12 mm)
Performance
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
VOC: 0
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: Nine months, if unopened
Warranty: ARDEX Americas Standard Limited Warranty applies.
For complete product technical information, click on the Downloads tab and open the Technical Data download.
Downloads ARDEX K 521™
BIM Objects ARDEX K 521™
Calculator ARDEX K 521™
Contact Us
Questions? Please fill out the form below to contact us with any of your questions or concerns. We look forward to hearing from you, and we’ll be in touch shortly.
"*" indicates required fields
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.
Key Features
- 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
- Dual water ratio
- Use for interior floors only
Standards
Tested in accordance with ASTM C1708
Technical Data ARDEX K 521™
Installation
Mixing Ratio: 3 1/2 or 3 3/4 quarts (3.31 or 3.55 L) of water per 50 lb. (22.7 kg) bag
Coverage: 14 – 15 sq. ft. per bag at 3/8” (1.3 – 1.4 sq. m at 9 mm)
9 – 10 sq. ft. per bag at 1/2” (0.8 – 0.9 sq. m at 12 mm)
Performance
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
VOC: 0
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: Nine months, if unopened
Warranty: ARDEX Americas Standard Limited Warranty applies.
For complete product technical information, click on the Downloads tab and open the Technical Data download.
Downloads ARDEX K 521™
BIM Objects ARDEX K 521™
Calculator ARDEX K 521™
Contact Us
Questions? Please fill out the form below to contact us with any of your questions or concerns. We look forward to hearing from you, and we’ll be in touch shortly.
"*" indicates required fields