Self Leveling Underlayments - Sika® Level-125

Durable, cementitious, self-leveling underlayment

Sika® Level-125 is a one part, polymer modified, pumpable self-leveling underlayment for the leveling and smoothing of interior floors prior to the application of the final floor finish.

• Easy to place by pump or manual application
• Capable of levelling surfaces from 1/8" to 2-1/2" (3.2 - 62.5 mm)
• Reduced shrinkage
• Good bond and compaction
• Fast hardening and good drying
• Good surface hardness
• Suitable for overcoating with non-moisture sensitive tile after 2-3 hours

Usage

• Can be applied manually or by pump to level floors
• Leveling of both large and small surfaces
• Typical uses are in commercial, residential and domestic properties etc.
• Providing a suitable substrate for ceramic, stone or vitrified clay tiles, carpets and wood flooring.
• Compatible with the Sika^® adhesives used to lay these types of floor finishes.

Advantages

• Easy to place by pump or manual application
• Capable of levelling surfaces from 1/8" to 2-1/2" (3.2 - 62.5 mm)
• Reduced shrinkage
• Good bond and compaction
• Fast hardening and good drying
• Good surface hardness
• Suitable for overcoating with non-moisture sensitive tile after 2-3 hours

Packaging

50 lb (22.7 kg) bag

Color

Gray powder

Product Details

Product Information

Cement-based, polymer-modified binder system and fillers

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging

Store dry at 41-86 °F (5-30 °C)

Protect from moisture. If damp, discard material

Technical Information

Suitable for use with underfloor heating systems

Application

Application Information

4 qts (3.8 L)

65-75 °F (18-24 °C)

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).

< 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.

41-86 °F (5-30 °C)

~20-25 minutes

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.

Application Steps

All 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-125.

• Pour 4 qts (3.8 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-125 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.

• 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-125 layers from high ambient temperatures, direct sunlight and ensure an adequate air circulation.
• Sika® Level-125 does not provide an aesthetic finish and is not intended to be use as a wear layer even if coated or sealed. Sika® Level-125 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 2" (50 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.

• Clean all tools and application equipment with water immediately after use.
• Hardened / cured material can only be removed mechanically.

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