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FLYT GROV

Screed for high thickness (up to 80 mm)

Additional Downloads
MSDS
1. Subfloor Preparation Guide (55 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

BOSTIK Flyt Grov self-levelling compound is suitable for smoothing and levelling of screeds, concrete floors and other hard, rigid bases (ceramic tiling and special plasterboards).

BOSTIK Flyt Grov is suitable for heavy-duty areas and for normal wear in private locations. It can be applied in layers between 3-80 mm thickness in one work step. Suitable for heavy-duty areas from 3 mm thickness.
Can be used on traces of hard, sound and water-tight adhesives (existing acrylic, neoprene and bituminous film).
Suitable under parquet/wood floors, plastic and textile coverings, linoleum and tiling.
Not to be used as a wearing surface. For interior use only.

Benefits

- Easy to prepare

- Self-levelling and self-smoothing

- Exceptional application and mechanical properties

- Pumpable

- Suitable for underfloor heating
- Suitable under parquet/wood floors

Properties

Physical:

- Composition: Synthetic resin modified cement powder

- 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: 20 minutes at +20°C

- Set for walking: after 3-5 hours

- Dry for floor covering: after approx. 48 hours at 1-10 mm thickness

- 14 days at > 14 mm thickness

- Resistant to castor wheels: at 3 mm or above

- Compressive strength: 28 MPa

- Bending strength: 8 MPa

- Shear Strength: 1.5 MPa

- Shrinkage: not above 0.5%
- Suitable for underfloor heating: Yes

Consumption:

1.6 kg/m² per 1 mm thickness

Safety:

IMPORTANT: before embarking on any work involving BOSTIK Flyt Grov 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:

Up to 6 months in the original unopened bag in dry conditions.

Application

PREPARATION

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. If not, use EPONAL 336 Moisture Vapour Barrier coating.

New asphalt screeds should be shot-blasted first.

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.

Other substrates require application of specific primers.

Underfloor heating

Underfloor heating systems must comply with current building regulations. In all cases drying time must be respected. Turn off the heating 48 hours before starting the work. The heating should be turned up to its operating temperatures gradually, in stages over 48 hours after laying the floor covering. Do not apply when underfloor heating is in operation.

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.

MANUAL 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.

MECHANICAL PREPARATION (PUMPABLE)

BOSTIK FLYT GROV 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, BOSTIK FLYT GROV is pumped and applied to the desired thickness (80 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.

REMARKS

Do not use BOSTIK FLYT GROV :

- on brittle, soft or permanently humid substrates.

- on old floor coverings (special cases: consult us).

- do not add water to the compound after it has started to set.
- do not apply directly on metal substrates

Packaging

Presentation	Bar code	Bostik code
bag - 25 kg		129910