Sika® Level-325 is a one-component, durable and
versatile cementitious underlayment for interior and
exterior concrete and cementitious substrates. It can be
applied manually or by pump to produce a selfsmoothing, rapid-setting and flat substrate prior to the
application of a final floor finish. Typical application
thickness is 1/8” up to 1-1/2” (3 up to 38 mm).
▪ Cement substrates
▪ Rapid drying cement screed systems
▪ OSB/Plywood only suitable for flexible coverings
▪ Ceramic tiles, terrazzo or natural stones
CHARACTERISTICS / ADVANTAGES
▪ Levels new and renovates old floors
▪ For interior and exterior use
▪ Manual or pumpable applications
Excellent underlay for all type of residential and
▪ Compatible with subfloor heating systems
▪ Easy installations
▪ High strength
▪ Low shrinkage
Can accept caster wheel loading if the thickness is
greater than 1/8’’ (3.2 mm)
No MVER (Moisture Vapor Emission Rate) limits on
well prepared concrete
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, unopened
and undamaged sealed packaging
Storage Conditions Store dry at 41–86 °F (5–30 °C)
Protect from moisture. If damp, discard material
Compressive Strength 1 day 2,000 psi (14 MPa)
7 days 3,500 psi (24 MPa)
28 days 5,300 psi (37 MPa)
73 °F (23 °C)
50 % R.H.
Flexural Strength 28 days 1,500 psi (10 MPa) (ASTM C-293)
73° F (23 °C)
50 % R.H.
Tensile Adhesion Strength 3 days at 1/8″ 500 psi (3.4 MPa) (ASTM C-1583)
Thermal Resistance Suitable for use with underfloor heating systems
Mixing Ratio 4.75 qts (4.5 L)
Fresh mortar density 133 lb/ft3 (2.1 kg/l) (ASTM C-138)
Coverage 26 ft2 at 1/4” (2.3 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 1/8” (3 mm) 1-1/2” (38 mm)
Extended 1/4” (6 mm) 3” (76 mm)
*2″ (50 mm) in localized area
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 Approx. 20 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: 4 hours
Suitable for overcoating with:
Non moisture sensitive floor covering 4 hours
Moisture sensitive floor covering 24 hours up to 3/8″ (9.5 mm)*