Sika Sikafloor 122 Level

Sika Sikafloor®-122 Level Self Levelling Compound is a one pack, ready to use, protein free, cement based, self leveller for floor smoothing and levelling uneven rigid internal floors prior to applying final wearing coverings such as carpets, sheet vinyl, lino, tiles, laminates and timber.

Best Uses

Sikafloor®-122 Level is a floor levelling compound to level or smooth screeds and concrete floors at a thickness between 6mm to featheredge. Suitable for foot traffic only.

• Self smoothing and highly fluid
• Easy to place by pump or manual application
• Ready for use
• Low shrinkage
• Maintains good workability and joint healing throughout its pot life
• Fast setting and drying.
• 2-4 hours walk on time (+20°C).
• Good surface appearance and hardness.
• Excellent freeze-thaw salt resistance
• Protein and formaldehyde free
• Underfloor heating applications beneath heating cables/pipes or on top of heated screeds

Application

SUBSTRATE QUALITY / PRE-TREATMENT

Priming
The one-part acrylic primer Sika® -Level-01 Primer is recommended for a pore-free surface with very good surface adhesion. Please refer to the relevant PDS for the recommended application details etc. SikaBond® PVA (1 part PVA to 4 parts clean water) may also be used.

Levelling
Apply to the required thickness up to 6mm.

Substrate Quality
The concrete substrate must be sound and of sufficient compressive strength (min. 25 N/mm²) with a minimum pull off strength of 1.5 N/mm². The surface must possess an effective dampproof membrane. The surface should be free from residual adhesives, dampproof membranes, oil, grease, wax, loose flaky paint, dust, laitance. etc. that could reduce adhesion. Switch off underfloor heating 24 hours before, and for 24 hours after, application. Ensure floor temperature is >5°C. If in doubt apply a test area first.

Substrate Preparation
Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed. Repairs to the substrate, filling of blowholes/voids, etc must be carried out using appropriate products such as Sika® Concrete Repair Mortar.

• Normal concrete / screed: If the substrate is strong and has a sufficiently rough texture, Sikafloor®-122 Level can be applied directly onto the substrate. Avoid bubbles by dampening the substrate until a SSD condition is achieved. If the SSD option is chosen, the mechanically prepared concrete must then be thoroughly dampened during the 24 hours prior to the screed application by keeping at least 4 – 5 mm of water on the surface and letting it soak into the substrate. Remove the excess water prior to laying the screed. Any pores which may appear on the screed would indicate that the substrate was not sufficiently saturated.
• Porous / Concrete Screed: All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum. Prime as indicated above. For highly porous substrates it may be necessary to apply more than one coat of primer to prevent pinholes and cracking / debonding of Sikafloor ®-122 Level.
• Non Porous/Dense Substrates: (quarry/ceramic tiles, terrazzo and smooth concrete etc) Mechanically roughen surfaces by grinding or scarifying to provide a mechanical key - specialist advice and machinery may be required. Alternatively, apply a bonding coat of undiluted SikaBond® PVA and allow to become tacky before applying levelling compound.

MIXING
Unfilled (up to 6mm thick): Mix Sikafloor®-122 Level with clean water only. Slowly add 5 parts powder to 1 part water (25kg powder will require 5 litres / 5kg of water). Mix in a suitable clean container using a mechanical mixer with a spiral mixing paddle at slow speed until fully mixed and a
smooth consistency achieved. Occasionally during hot weather the product may require remixing during the 15 - 20 minute pot life to reactivate the self-levelling characteristics. Do NOT add extra water. Discard any unused material after 20 minutes from initial mixing.

Mixing Time
Mix thoroughly for a minimum of 3 minutes.