Level and Smooth Existing Substrates with UC Leveller by MAPEI
Fast hardening levelling smoothing compound for thicknesses from 3 mm to 70 mm: especially recommended for pumping.
Classification According To EN 13813
The material properties of UC Leveller comply with the norms referred to in this technical data sheet and are classified as CT-C25-F7fl according to EN 13813.
Where to Use
UC Leveller is used for levelling and smoothing of new or existing substrates prior to the installation of carpet, carpet tiles, ceramic tiles, natural stone or floating timber flooring. UC Leveller is used in areas where resistance to heavy loads and traffic is required, along with an especially smooth surface.
UC Leveller can be used in interiors in thicknesses from 3 to 70 mm as a bulk-filling underlayment compound. For thicknesses above 40mm it is recommended to add 30% of 3-5mm aggregate.
Because of its levelling properties and ease of pumpability, UC Leveller increases daily productivity and considerably reduces the cost of substrate preparation.
Some application examples:
- Smoothing concrete slabs and cement-based screeds.
- Smoothing anhydrite screeds.
- Smoothing for under-floor heating installations.
- Smoothing over existing ceramic tile, terrazzo, natural stone and magnesite floors.
Technical Characteristics
UC Leveller is a grey powder composed of special fastsetting and hydrating cements, specially graded silica sand, resins and special additives prepared according to a formula developed in the MAPEI research laboratories.
When mixed with water, UC Leveller becomes a fluid, easy to work mix that has excellent self-levelling properties and cures rapidly. UC Leveller can be applied using an automatic pressure pump.
UC Leveller is strong enough to withstand wheeled chair traffic. Each coat of UC Leveller can be applied in thicknesses of up to 70mm without significant shrinkage that might cause cracks or crazing. For thicknesses above 40mm it is recommended to add 30% of 3-5mm aggregate. Once completely dry UC Leveller has excellent compressive and flexural strength as well as resistance to impact and abrasion.
Flooring can be installed once UC Leveller has dried (12 hours for light foot traffic and 24 hours waiting time before installing flooring at 23°C and 50% RH), depending on the thickness, temperature and moisture in the environment.
Recommendations
- DO NOT add more water to the mix once it has begun to set.
- DO NOT add lime, cement or gypsum to the mix.
- DO NOT use for smoothing in exteriors or for substrates subject to rising damp.
- DO NOT apply another coat of UC Leveller once the previous one has completely dried without first applying diluted Eco Prim T or Eco Prim T Plus (1 part Eco Prim T or Eco Prim T Plus diluted with 2 parts water).
- DO NOT use UC Leveller at temperatures below +5°C and above +35°.
- DO NOT use for levelling over timber substrates. Instead use Latexplan Trade or Nivorapid mixed with Latex Plus.
- DO NOT apply UC Leveller in thicknesses less than 3mm.
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