Product specifications
Download Jobsite Flooring spec sheet (PDF)- Brand
- ARDEX
- Product type
- Self-leveling concrete topping
- Coverage
- 14–15 sq. ft. per 50 lb bag at 3/8 in.; 9–10 sq. ft. at 1/2 in.
- Thickness
- 3/8–2 in.
- Mixing ratio
- 3.5–3.75 qt water per 50 lb bag
- Flow time
- 10 minutes
- Time to foot traffic
- 2–3 hours (24 hours with ARDEX E 25)
- Time to polish
- 24 hours (48 hours with ARDEX E 25)
- Compressive strength
- 6,800 psi at 28 days
- Standards
- ASTM C1708
- Colors available
- Gray
- VOC
- 0
ARDEX K 521 Self-Leveling Concrete Topping · JF-11140
ARDEX K 521 Self-Leveling Concrete Topping
Floor prep & leveling
ARDEX K 521 is a pourable, polishable self-leveling topping that contains aggregate, so grinding and polishing gives an aggregate-exposed concrete look. It resurfaces interior concrete 3/8 to 2 in. thick and can be polished in about 24 hours.
What it’s used for
- Polished aggregate-exposed concrete floors
- Fast-track resurfacing of interior concrete
- Over ARDEX MC RAPID moisture control
- Interior floors only
REGULAR PRICE$67.46 / bag
Contractors and builders get trade pricing with an account. See trade accounts
Sold individually, priced per bag.
Minimum order: 1.
Special pallet pricing available
Contact us for pricing: 703-929-8455 or orders@jobsiteflooring.com.
Availability: Confirm before ordering
1 bag$67.46
Estimated lead time: 1–2 weeks. Delivery to Virginia, Washington, D.C., and Maryland. We’ll reach out with a quote that includes shipping after you request an order.
Delivery, cancellations & damage policy