Self Leveling Underlayments - Sika® Level-225
Superior flow, cementitious, self-leveling underlayment
Sika® Level-225 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, flat and economical substrate prior to the application of a final floor finish. Typical application thickness is 1/16”-1-1/4” (1.5-31 mm).
- Highly 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
- Very smooth surface
Usage
- Concrete
- Cement substrates
- Rapid drying cement screed systems
- OSB/Plywood only suitable for flexible coverings
- Ceramic tiles, terrazzo or natural stones
Advantages
- Highly 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
- Very smooth surface
Packaging
55 lb (24.9 kg) bag
Color
Gray powder
Product Details
Product Information
Chemical BaseCement-based, polymer-modified binder system and fillers
Shelf Life12 months from date of production if stored properly in original, unopened and undamaged sealed packaging
Storage ConditionsStore dry at 41-86 °F (5-30 °C)
Protect from moisture. If damp, discard material
Application
Application Information
Mixing Ratio5.25-6 qts (5-5.7 L)
Product Temperature65-75 °F (18-24 °C)
Ambient Air Temperature41-95 °F (5-35 °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 Temperature41-95 °F (5-35 °C)
Pot Life~ 15-20 minutes
As the temperature will affect the pot life, application temperature:
Consumption
Coverage28 ft2 at 1/4” depth (2.3 m2 at 6 mm) per bag
(Coverage figures do not include allowance for surface profile and porosity or material waste)
Application Steps
APPLICATION INSTRUCTIONSAll substrate must be dry, stable, sound and free of all contaminants such as grease, oil, paint, wax, dust, curing and sealing compounds that will interfere with the penetration the primer and the adhesion of Sika® Level-225.
MIXING- Pour 5.25-6 qts. (5-5.7 L) of cool potable water (~ 70 °F, 21.1 °C) into a suitably sized and clean mixing container, using a calibrated measuring jug, or similar, to ensure strict control of the water content (do not over-water). If available water is not at this temperature, then consideration should be given to cooling/heating the water.
- Add Sika® Level-225 to the water, while slowly mixing, adding the complete contents of the bag.
- Mix with a high-speed drill (> 650 rpm) and an egg beater style mixing paddle to blend water and powder for approximately 3 minutes, until a lump-free and uniform mix has been produced.
- Do not overmix or allow the paddle to rise above the level of material as this will introduce and entrap air into the mix, potentially shortening the working life or causing pin-holing in the underlayment.
- Let the mixed material stand until the majority of air bubbles have dispersed.
APPLICATION- Pour the mix and spread using a smoothing trowel. Even surfaces are easily achieved using a pin leveler. It’s not recommended to remove troweling defects or to level more than once.
- If a second layer of leveling compound has to be applied, prime the first layer with Sika® Level-01 Primer Plus (1:1) when the first layer is walkable. The maximum layer thickness must not be exceeded in case of two layer applications and the second layer must not exceed the layer thickness of the first layer.
- Protect curing Sika® Level-225 layers from high ambient temperatures, direct sunlight and ensure an adequate air circulation.
- Sika® Level-225 is not intended to be used as a wear layer even if coated or sealed. Sika® Level-225 must be protected from any type of contamination by installing a suitable floor covering like ceramic tiles, carpet, VCT, wood floor, etc.
- Always install an adequate number of properly located test areas, to include the finish flooring.
- As floor coverings vary, always contact and rely upon the floor covering manufacturer for specific directions such as maximum allowable moisture content, adhesive selection, and intended end use of the product.
EXTENSION WITH AGGREGATES
- For applications greater than 1-1/4" (25 mm) in depth, add 3/8" (9.5 mm) coarse aggregate.
- The aggregate must be non-reactive (reference ASTM C-1260, C-227 and C-289), clean, well graded, Saturated Surface Dry (SSD), have low absorption and high density, and comply with ASTM C-33 size number 8 per Table 2.
- Pre-washed 3/8” (9.5 mm) pea-gravel can be pre-placed onto the primed area being leveled at no more than 1/3 of the total placement depth. Pour the material over the aggregate and rake to ensure proper consolidation around the aggregate and a proper bond with the substrate. Applicator must be aware that the aggregate can cause voids in the underlayment if not filled correctly.
- Variances in aggregate may result in different strengths and flow.
- The addition rate is 25 lb. (11.4 kg) of aggregate per bag. It is approximately 2.0 gal. (7.6 L) by loose volume of aggregates.
- The final 1/8-1/4" (3.2-6.3 mm) layer should be neat to allow for a smooth finished floor.
- Do not add more water.
CLEANING OF TOOLS- Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.
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