ARDEX K 301™ Exterior Self-Leveling Concrete Topping is a self-leveling topping and underlayment for fast-track resurfacing and smoothing for exterior and interior applications over concrete and approved, properly prepared, non-porous surfaces, including terrazzo, epoxy coatings and ceramic and quarry tile – on, above or below grade.

Key Features

• A blend of Portland cements and other hydraulic cements
• Smooth new or existing concrete and approved non-porous surfaces
• Install from 1/4″ – 3/4″ (6 – 19 mm) neat and up to 2” (5 cm) with aggregate
• Walk on in 2 to 3 hours
• Freeze-thaw resistant
• Suitable for use in wet areas
• For commercial, light industrial and residential applications
• Use for exterior and interior applications
• Suitable for use under the ARDEX MC™ Moisture Control Systems
• Can be used as an underlayment prior to installing floor covering

Standards

Tested in accordance with ASTM C1708

Installation

Mixing Ratio: 5 quarts (4.73 L) of water per 50 lb. (22.7 kg) bag
Coverage: 23 sq. ft. per bag at 1/4” (2.1 sq. m at 6 mm)
12.5 sq. ft. per bag at 1/2” (1.1 sq. m at 12 mm)

Performance

Flow time: 10 minutes
Compressive strength (ASTM C109/mod – air cure only): 4,300 psi (301.0 kg/sq. cm.) at 28 days
Flexural strength (ASTM C348): 1,000 psi (70.0 kg/sq. cm.) at 28 days
Walkable: 2 – 3 hours
Min. Cure Time prior to coating: Waterborne: 24 hours
Solvent-borne and 100% solids (less than 20 mils/0.5 mm): 48 – 72 hours
High build polymer coating (greater than 20 mils/0.5 mm): 7 days
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: 1 year, if unopened
Warranty: ARDEX L.P. Standard Limited Warranty applies.