Kerakoll Levelflex Rapid extended information
Coverage: ≈ 1.525 kg/m2 per mm of thickness
Application
Intended use:
Self-levelling correction of irregular and uneven substrates, ultra-rapid setting and drying, and compensated shrinkage. Thicknesses from 2 to 15 mm.
Compatible adhesives:
- gel adhesives, mineral adhesives, single- and two-component organic mineral adhesives
- reactive-epoxy and polyurethane, single and two-component cement-based adhesives, dispersed in water or solvent solutions
- single- and two-component organic adhesives for hardwood floor laying
- Covering materials:
- ceramic, porcelain, natural stone and mosaic tiles
- hardwood floors
- resins for industrial floors from the Kerakoll Factory range
Substrates:
- mineral screeds made with Keracem Eco as binder or pre-mixed product
- cement-based screeds
- calcium sulphate-based screeds
- prefabricated concrete or fresh concrete castings
Internal floors in domestic and commercial applications.
Do not use in external applications, on wet substrates subject to moisture rising or floating applications, in environments where water is always present.
Instructions for use
Preparation of substrates
The substrate must comply with current British standards and industry regulations. In general, substrates must be free of dust, oil and grease, free from any moisture rising, with no loose, flaky or imperfectly anchored parts such as residues of cement, lime, paint coatings and adhesives, which must be completely removed. The substrate must be stable, non-deformable, without cracks and have already completed the curing period of hygrometric shrinkage.
In particular, substrates must be treated with a suitable primer as shown in the table below:
Substrates
| Substrate | Primers | Dilution with water |
|---|
| Cement-based screeds | Primer A Eco | Diluted |
| Calcium sulphate- based screeds | Primer A Eco | Undiluted |
| Concretes | Primer A Eco | Diluted |
| Ceramic floors ceramic tiles | Keragrip Eco | Undiluted |
| Flooring grade plywood | Primer A Eco | Diluted |
| Gypsum fibre or fibre-cement panels | Primer A Eco | Diluted |
| Metal substrates | Keragrip Eco | Undiluted |
Preparation
Pour 4.5 – 5.0 l of clean water into a clean container; then pour in a bag of Kerakoll Levelflex Rapid, while shaking. Mix with a mechanical mixer until a smooth, lump-free and self-levelling mixture is achieved. Larger quantities of Levelflex Rapid may be prepared in suitable mixers. After the first mixing, it is advisable to leave the mixture to rest for approx. 2 minutes and then mix again briefly. Kerakoll Levelflex Rapid features a high degree of self-levelling capacity. Adding extra water does not improve the workability of the product, and may cause shrinkage in the plastic phase of drying and result in less effective final performance with a reduction in surface hardness, compressive strength and adhesion to the substrate.
Instructions for use
Application
Kerakoll Levelflex Rapid is generally applied with a flooring trowel. The use of a spike roller or aeration roller can be used to further improve the surface finish of Levelflex Rapid by removing entrapped air from the mixture.
In the case of low temperatures and high humidity it is advisable to keep the environment ventilated during application and during the hours immediately following application, in order to avoid the formation of condensation on the surface of the self-levelling product during the setting phase. Protect from air currents at actual floor level.
Cleaning
Residual traces of Levelflex Rapid can be removed from tools using water before the product hardens.
Notes:
Joints: perimeter expansion must be allow for in the application of self levelling compounds. Perimiter expansion edging strip must be installed along the whole perimeter of the room, on the walls and on any other vertical elements protruding from the supporting layer. Large and continuous surface areas need to be fractionised as soon as they can withstand foot traffic so to create areas < 100 m2 with 10 m maximum individual size. All movement or expansion joints located in the substrate must be respected.
Overlaying: if an additional application of Kerakoll Levelflex Rapid is required once the initial application has been completed, the first installation layer must first be hardened and ready to accept foot traffic and additional application, this is generally after 30 minutes. The initial layer of Levelflex Rapid must be primed with a neat coat of Kerakoll Primer A Eco prior to subsequent applications.
Kerakoll Levelflex Rapid technical data
| Appearance | beige pre-mixed |
| Apparent volumetric mass | ≈ 1.11 kg/dm3 |
| Mineralogical nature of inert material | silicate - crystalline carbonate |
| Grading | 0 – 600 μm |
| Shelf life | ≈ 12 months from the date of production in the original, unopened packaging; protect from humidity |
| Mixing water | ≈ 4.5 - 5.0 l / 1 bag 20 kg |
| Specific weight of the mixture | ≈ 1.99 kg/dm3 (UNI 7121) |
| Self levelling time | ≈ 10 min. |
| End setting time | ≈ 30 min. |
| Temperature range for application | from +5 °C to +35 °C |
| Maximum thickness | between 2 and 15 mm |
| Foot traffic | ≈ 30 min. |
| Waiting time before laying: | |
| ceramic, porcelain, natural stone and mosaic tiles | ≈ 30 min. |
| Coverage | ≈ 1.525 kg/m2 per mm of thickness |
Kerakoll Levelflex Rapid performance data
| VOC Indoor Air Quality (IAQ) - Volatile organic compound emissions | | |
| Conformity | EC 1 Plus GEV-Emicode | GEV certified 17674/11.01.02 |
| HIGH-TECH | | |
| Resistance to: | | |
| - compressive after 24 h | >= 8 N/mm2 | EN 13892-2 |
| - compressive after 7 days | >= 15 N/mm2 | EN 13892-2 |
| - compressive strength after 28 days | >= 25 N/mm2 | EN 13892-2 |
| - flexural after 28 days | >= 7 N/mm2 | EN 13892-2 |
| Classification/Conformity | CT-C25-F7 | EN 13813 |
NB
- Product for professional use
- abide by any British standards and industry regulations
- do not use Levelflex Rapid to correct substrate irregularities greater than 15 mm in a single coat do not add other binders, additives or pigments to the mixture
- low temperatures and high relative humidity lengthen the drying time and can saturate the environment; this may have a negative effect on the quality of the surface of the self-levelling product
- an excessive quantity of water will reduce strength and the drying time
- respect any movement or expansion joints present in the substrate
- if necessary, ask for the safety data sheet for any other issues, contact the Kerakoll Worldwide Global Service
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