ARDEX K 520 Self-leveling concrete screed 50 lbs

ARDEX K 520 is a self-leveling screed for quickly resurfacing interior concrete, smoothing or leveling it, and some non-porous surfaces. ARDEX K 520 can be installed 25 mm (1 in) neat and up to 7.5 cm (3 in) thick with the addition of the appropriate aggregate (see Technical Data section for minimum installation thickness per application).

Important Features

• A mixture of Portland cement and other hydraulic cements.
• Lining interior concrete and some non-porous surfaces
• Walk on in two to three hours, seal in as little as 24 hours
• Polish in as little as 24 hours
• Use for interior floors only

Standards

Tested in accordance with ASTM C1708

Facility

Mixing ratio: 4.73 l (5 pints) of water per 22.7 kg (50 lbs) bag
Coverage: 2.4 m ² (25 ^ft2) per bag at a thickness of 6 mm (1/4 in)
^1.6m2 (16.7 sq. ^ft .) per bag at 9.5 mm (3/8 in.) thickness
^1.2m2 (12.5 sq. ^ft .) per bag at 12 mm (1/2 in.) thickness

Yield

• Flow time: 10 minutes
• Compressive strength (ASTM C109/mod – air dry only): 420 kg/cm² (6000 psi) after 28 days
• Flexural strength (ASTM C348): 84 kg/cm² (1200 psi) after 28 days
• Practicable: 2 to 3 hours
• Minimum drying time before coating: In water: 24 hours
• Solvent-based and 100% solids (less than 20 mils/0.5 mm): 48 hours
• High build polymer coating (greater than 20 mils/0.5 mm): seven days
• VOC: 0
• Packaging: Net bag weight 22.7 kg (50 lbs)
• Storage: Store in a cool, dry place. Do not leave the bags exposed to the sun.
• Shelf life: Nine months (unopened)
• Warranty: ARDEX LP standard limited warranty applies.