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Applications: Self-levelling compounds (9); Substrate preparation/Primers (1)
Brands: Bostik (1); Roxol
Destinations: ~~Floors~~ (10)
Specific characteristics: Exterior (1); Ready-to-use (1)
Substrates: ~~Ceramic tiles~~ (10)
Segments: ~~Construction~~ (10)

ROXOL FLEX

Fibre-reinforced self-levelling compound. For heavy-duty and thickness up to 30 mm

Additional Downloads
MSDS
1. Subfloor Preparation Guide (55 Kb)
2. Primers and self-levelling compounds (1642 Kb)
Definitions
ImperviousCharacterisitc of a subfloor which porosity is very low. Adhesion on such substrates is usually more difficult and requires more attention and preparation.
PrimerLiquid or paste applied onto a substrate to obtain optimum bonding. It helps regulate the porosity of the substrate (reduce absorption, therefore adhesive usage), increase adhesion to non porous surfaces, improves application properties of later on applied adhesive
Tiling
Working timeTime between end of waiting time and moment when the application is no longer possible

Uses

ROXOL FLEX self-levelling compound is a flexible levelling compound reinforced with synthetic fibres, especially for smoothing and levelling of wooden floorboards, moisture resistant particle boards, mastic asphalt screeds, cement screeds, residues of adhesive and paint, existing semi-flexible floors and plasterboard.
Suitable under floor coverings such as: PVC, fitted carpet, lino, parquet, floor tiles.
ROXOL FLEX is suitable for hard/heavy wear. It can be applied in layers between 1-30 mm thickness (3-30 mm for heavy-duty area) in one work step.
Not to be used as a wearing surface.
For interior use only.

Benefits

Fibre-reinforced
Highly elastic
Good mechanical properties
Self-smoothing
Rapid hydraulic setting
Suitable for underfloor heating
Suitable under parquet/wood floors > 3mm thickness
Pumpable

Properties

Physical:

Primer Type: Synthetic resin modified cement powder, low in chromate
Colour: Grey
Working temperature : Preferably between +8°C and +25°C. Not below +5°C or above +30°C
Mixing ratio: 6 litres of water per 25 kg bag
Working time/Flow life: 30 minutes at +20°C
Set for walking: 5 hours at +20°C
Dry for floor covering: after 48 for bonding with water-based adhesives, after 72 hours for bonding with solvent-based adhesives
Resistant to castor wheels: at 1 mm or above
Compressive strength: After: 28 days = 35 MPa
Suitable for underfloor heating: Yes

Consumption:

Approx. 1.5 kg/m² per 1mm layer thickness

Safety:

IMPORTANT: before embarking on any work involving ROXOL FLEX the separate Product Safety Data Sheet must be studied carefully by those carrying out the work. Do not breath dust, PREVENT skin and eye contact with powder and particularly the wet material when mixed. Strong alkali when wet – can cause serious eye damage and may cause an allergic reaction resulting in skin disorders.

Shelf life:

Can be stored up to 9 months in dry conditions.

Application

PREPARATION

Preparation should be in accordance with building standards. Subfloors must be sound, of adequate tensile and compressive strength; free from laitance, cracks and structural defects; clean and free from dust, grease, curing compounds, sealers or any other contaminants that would inhibit proper bond.

Substrate residual moisture content must be less than 3%.

For anhydrite slabs, moisture content should be less than 1% for laying textile coverings and ceramic tiles, 0.5% for laying plastic coverings and parquet floors.

Adhesive residues that are hard, sound and water-tight should be mechanically cut-back to a minimum.

Soft and weak adhesive residues and smoothing underlayments should be completely removed.

New asphalt screeds should be sand-blasted.

Tiles must firmly adhere to the base, re-fix them if necessary. If the floor tiles are easily removable, remove them completely.

Ensure sufficient under-ventilation of wooden floors. Moisture content of the wood must be between 7 and 11% before applying the primer.

The following substrates must be pre-treated with suitable Bostik primers and bonding agents:

Substrates	Recommended Primer	Consumption	Remarks
Absorbent concrete and cement screeds	Unidur 10 1:3 water-diluted	100 g per sqm/layer	Water based primer
Normally absorbent concrete and cement screeds	Unidur 10 1:3 water-diluted or Unidur N 1:1 water-diluted	100 g per sqm	Water based primer
Impervious concrete and cement screeds, tiles, terrazzo and other similar dense surfaces, existing semi-flexible tiles	Unidur N (pure)	100 g to 150 g per sqm	Water based primer
Particle boards, plywood all qualities included waterproof or fireproof, plasterboards, bituminous adhesive residues, magnesite screeds, mastic asphalt screeds	Impreglue	100 g per sqm	Solvent based product - Flammable
Wooden floors, particle boards, plywood all qualities included waterproof or fireproof, plasterboards, adhesive residues ( bituminous, acrylic, alcohol based ), old floor paints, old industrial flooring (epoxy or PU), mastic asphalt screeds, existing semi-flexible tiles.	Primepox	100 g to 150 g per sqm	Water-based epoxy primer 2 components
Wooden floor, particle boards, plywood with gap filling	Primabois	350 to 600 g per sqm	Water-based cementitious primer
Metal decking	Eponal 336	200 g to 250 g per sqm	Epoxy damp proof primer- 2 components
Concrete, cement screeds, old ceramic tiles with humidity above 3% or with negative pressure from the basement	Eponal 336	400 g to 800 g per sqm	Epoxy damp proof primer- 2 components

PRECAUTION: Before using primer read the primer data sheet carefully and respect our recommendations for ground preparation. Before proceeding with the subsequent application of the compound, always allow primers to dry in accordance with the technical information. Always allow at least 24 hours drying time for anhydrite screeds.

APPLICATION

Pour approx. 6 litres of clean water (water temperature +8° to +20°C) into a clean mixing bucket. Stir the compound powder into water with an electric drill and mixing paddle (<500 rpm) to obtain a lump-free mixture.

After mixing, a maturing time of at least 1 minute is recommended to optimise flow. Remix for 30 seconds.

The smoothing and levelling compound must be applied to the substrate within the specified working time and smoothed with a stainless steel float. Spread the compound to zero in order to fill the pores, then smooth and spread in a regular manner to the desired thickness Further finishing with a self-smoothing compound is not required. However, any subsequent application is best performed as soon as the first layer is set for walking but still damp. If it is dry, an intermediate primer coat of water-based primer UNIDUR N or UNIDUR 10 is required.

In case of several lays of self-levelling the upper lay must not exceed the thickness of the bottom lay.

MECHANICAL PREPARATION (PUMPABLE)

ROXOL FLEX can be mixed using a continuous "mixing-pump". In this case the optimum water content is regulated on the basis of product viscosity. This one must be equal to the viscosity obtained by standard mixing of 1 bag in 6 litres of water. (See the technical guidance / procedure relative to the technical system for preparing interior floors for the application of thin floor coverings).

Once mixed, ROXOL FLEX is pumped and applied to the desired thickness (30 mm maximum in one single continuous coat).

Hint: For thicker layers, using a spiked roller will help air evacuation and improve surface finish.

For all additional information, please contact our technical department.

Protect from excessively rapid drying, e.g. due to direct sunlight, draught or high room temperature. Conversely, poor airflow and low temperatures will significantly increase drying times. Do not lay floor coverings until the compound is completely dry.

For layers above 20 mm thickness, it is recommended to install an 3mm thickness expansion strip around perimeter walls, pillars and other vertical components.

CLEANING
Tools may be cleaned with water whilst the mix is still wet.

Packaging

Presentation	Bar code	Bostik code
bag - 25 kg	3184411210900	505441