Description
Rapid setting, durable, cementitious self-leveling underlayment
PRODUCT DESCRIPTION
Sika® Level-525 Rapid is a one-component, durable and
versatile cementitious underlayment for interior
concrete and cementitious substrates. It can be applied
manually or by pump to produce a self-smoothing,
rapid-setting, and flat substrate prior to the application
of a final floor finish. Typical application thickness is
1/16” to 1/2” (1.5 to 12.7 mm).
USES
Concrete
Cement substrates
Rapid drying cement screed systems
OSB/Plywood only suitable for flexible coverings
Ceramic tiles, terrazzo or natural stones
CHARACTERISTICS / ADVANTAGES
Fluid self-leveling
Levels new and renovates old floors
Interior only
Manual or pumpable applications
Excellent underlay for all type of residential and
commercial flooring
Compatible with subfloor heating systems
Superior workability for easy installations
Rapid setting for fast job turnaround
Very high strength
Very low shrinkage
Can accept caster wheel loading if the thickness is
greater than 1/8’’ (3.2 mm)
For forklift truck traffic, layer thickness at least 1/8”
(3.2 mm)
PRODUCT INFORMATION
Chemical Base Cement-based, polymer-modified binder system and fillers
Packaging 55 lb (24.9 kg) bag
Appearance / Color Gray powder
Shelf Life 12 months from date of production if stored properly in original, un opened
and undamaged sealed packaging
Storage Conditions Store dry at 41–86 °F (5–30 °C)
Protect from moisture. If damp, discard material
TECHNICAL INFORMATION
Compressive Strength 1 day 5,000 psi (34.5 MPa)
7 days 5,500 psi (38 MPa)
28 days 7,600 psi (52.4 MPa)
(ASTM C-109)
73 °F (23 °C)
50 % R.H.
Flexural Strength 28 days 1,600 psi (11 MPa) (ASTM C-293)
73 °F (23 °C)
50 % R.H.
Tensile Adhesion Strength 3 days at 1/8″ 400 psi (2.8 MPa) (ASTM C-1583)
APPLICATION INFORMATION
Mixing Ratio 6-6.3 qts (5,75-6,0 L)
Fresh mortar density 118 lb/ft3 (1.8 kg/l) (ASTM C-138)
Coverage 30 ft2 at 1/4” (2.78 m2 at 6 mm) per bag
(Coverage figures do not include allowance for surface profile and porosity or material waste)
Layer Thickness Min. Max.
Neat 1/16” (1.5 mm) 1/2” (12.7 mm)
Extended 1/4” (6.3 mm) 1” (25 mm)
Product Temperature 65–75 °F (18–24 °C)
Ambient Air Temperature 41–86 °F (5–30 °C)
Note: When using water based adhesives on the finished product the best results will be achieved at ambient
and substrate temperatures between 59 and 77 °F (15–25 °C).
Relative Air Humidity < 75 %
Note: The substrate and uncured product applied on the floor, must be at least 5 °F above dew point to reduce
the risk of condensation, blooming or cement laitance forming on the surface.
Substrate Temperature 41–86 °F (5–30 °C)
Pot Life ~ 25 minutes
As the temperature will affect the pot life, application temperature:
Above 73 °F (23 °C) will reduce the pot life and the working time.
Below 73 °F (23 °C) will extend the pot life and the working time.
Waiting / Recoat Times Walk-on time: 1–1.5 hours
Suitable for overcoating with:
Non moisture sensitive floor covering 1.5–2 hours
Polyurthane adhesives 12 hours up to 1/8″ (9.5 mm)*
