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Bostik Cempolatex 1 Pack Latex Sub-Floor Levelling Compound 20Kg – Pallet Deals and Bulk Buy

Bostik Adhesives and Levellers - Terrific Pallet Deals and Bulk Buy

Bostik Cempolatex Latex Sub-Floor Levelling Compound

Bostik Cempolatex 1 Pack is a latex modified, protein-free self-smoothing sub-floor compound. It has excellent bonding properties and good flexibility that will accommodate the movement of closely fitted suspended flooring.

This rapid setting formula is ideal for smoothing and levelling properly prepared concrete, sand/cement screeds, quarry tiles, rigid timber floors, stone, brick and terrazzo floors and asphalt floors.

It may also be used as a floor topping/concrete re-surface with the addition of Bostik SBR, and for patching up to 100mm thickness.

Bostik Cempolatex 1 Pack is only suitable for warm water underfloor heating systems when used as a levelling compound.

  • Flexible, rapid setting formula
  • Latex modified and protein free
  • Can also be used as a levelling compound
  • For interior use
  • Suitable for use with underfloor heating
  • Accepts foot traffic in 2-4 hours
  • Good flexibility

Bostik Cempolatex 1 Pack Latex Sub-Floor Levelling Compound further information

Coverage:

Approx. 4-5m2 per bag at 3mm depth

Approx. 3m2 per bag at 5mm depth

(depending on the smoothness of the floor surface & application technique)

Bostik Cempolatex 1 Pack is a latex modified, protein- free smoothing compound. It has excellent bonding properties and good flexibility that will accommodate the movement of closely fitted suspended flooring. It is easy to apply and has good flow.

It is ideal for smoothing and levelling prepared concrete subfloors, sand/cement screeds, quarry tiles, rigid timber floors, stone, brick and terrazzo floors.

It is suitable for use with warm water underfloor heating systems, provided a surface temperature of +27°C is not exceeded. It is not to be used as a wearing surface and should always be covered with a floor covering. For interior use only.

Bostik Cempolatex 1 Pack product characteristics

ColourGrey
FormDry, free-flowing powder
Specific Gravity1.6 approx.
CompositionPolymer modified cement-based compound
Product Codes30622808 20kg bag
Storage/Shelf LifeStore and transport securely. Store for up to 6 months from date of manufacture in original, unopened packaging, clear of the ground, in
cool, dry conditions within the temperature range +5°C to +25°C
and out of direct sunlight. Protect
from excessive drafts, frost, damp, condensation and dew.

Bostik Cempolatex 1 Pack typical performance data

Application
Temperature
+5°C to +25°C
CoverageApprox. 4-5m2 per bag at 3mm depth

Approx. 3m2 per bag at 5mm depth

(depending on the smoothness of the floor surface & application
technique)
Gauging LiquidWater
Application Thickness3mm to 5mm
Working Times15 to 20 minutes after mixing

(depending on ambient
temperatures)
Drying TimesFoot traffic: approx. 2 to 4 hours at +20°C

Lay floor covering: approx. 16 hours at +20°C

Re-surfacing: 4 weeks before
protective coating
CleaningClean tools and equipment with
warm, soapy water immediately
after use

DIRECTIONS FOR USE

IMPORTANT: Before using Bostik Cempolatex 1 Pack, refer to the relevant Health & Safety Data Sheet, available at www.bostik.com/uk.

All phases of installation should comply with the latest
editions of:

  • BS 8102 Code of Practice for protection of structures against water from the ground.
  • BS 5325 Code of Practice for installation of textile floor coverings.
  • BS 8203 Code of Practice for installation of resilient floor coverings.
  • BS 8201 Code of Practice for installations of for flooring of timber, timber products and wood based panel products.

PREPARATION

Subfloor:

  • Ensure the subfloor is sound, clean, dry and of adequate tensile and compressive strength, free from loose material, laitance, cracks, structural
    defects and rising damp. Ensure there is an effective damp-proof membrane, which conforms to BS 8203.
  • The subfloor should be tested in accordance with British Standards, using a properly calibrated and insulated hygrometer. A reading of 75% RH or less confirms that the subfloor is satisfactorily dry.
  • Any contaminants that may hinder adhesion, such as grease, oil, dirt, dust, plaster, some curing compounds, surface hardeners, bitumen, additives and adhesive residues must be completely removed.
  • For optimum performance, a room temperature of +13°C to +18°C should be maintained for at least 24 hours prior to application. The temperature of the subfloor must be at least +5°C throughout the application and drying of the smoothing compound. Ensure that a maximum room temperature of +25°C is not exceeded during application.

Underfloor heating systems:

Warm water underfloor heating systems must be switched off for 48 hours before installation. Wait 48 hours after installation before gradually turning up underfloor heating.

NOTE: Bostik Cempolatex 1 Pack is only suitable for use with underfloor heating systems when mixed and applied as a smoothing compound. It is not suitable when used as a filling compound, floor topping, or when used with asphalt and contaminated surfaces.

Wooden surfaces:

Bostik Cempolatex 1 Pack can be applied over mosaic and wood blocks directly bonded to solid floors when there is an effective damp-proof membrane in, or beneath the subfloor.

It is suitable for use on stiff suspended floors constructed of chipboard, plywood or tongue and groove boards, provided there is adequate ventilation under the floor.

The timber must be a minimum of 18mm thick and screwed down at 300mm centres. Do not use on floors with a flexible surface, e.g. plain edge boards.

Do not use on boarded floors where joists are fixed directly to concrete because of lack of ventilation
and consequent risk of decay.

PRIMING

Prime very porous surfaces or extremely dry surfaces with Bostik Cempolay Universal Primer, diluted with 2 parts water. Allow to dry before applying Bostik Cempolatex 1 Pack.

Prime non-porous surfaces with undiluted Bostik Cempolay Universal Primer and apply Bostik Cempolatex 1 Pack.

MIX RATIOS

Smoothing compound 3mm to 5mm depth:

4.5 litres of water to 20kg Bostik Cempolatex 1 Pack.

MIXING & APPLICATION DEPTH

According to the mix ratios above, pour clean, cold water into a clean mixing bucket. Gradually add Bostik Cempolatex 1 Pack powder to the water, whilst continually mixing with an electric drill and mixing paddle until a smooth, lump-free mixture is obtained.

Do not mix more compound than you can use in 15 to 20 minutes. The mixture will remain workable for approximately 20 minutes under normal conditions.
If the mix begins to stiffen before it has been spread, it must be discarded. Do not re-temper, or add further water.

Note: the addition of too much water may result in separation of the compound.

When used as a smoothing compound, Bostik Cempolatex 1 Pack can be applied from a minimum depth of 3mm, up to 5mm in a single application.

Bulked out compound:

When bulked out to use as a filling compound, floor toping or patching compound, the product should be bulked out with sharp sand. The sand must be dry and added after mixing the water and powder together. Use the mix ratios and mixing process
detailed above.

NOTE: Bulked out compound is not suitable for use with underfloor heating systems. It is only suitable for use with underfloor heating systems when mixed
and applied as a smoothing compound.

Bostik Cempolatex 1 Pack APPLICATION

Smoothing compound:

Pour the mixed material onto the prepared subfloor in a continuous operation and allow to flow.

Using a steel screeding trowel, spread evenly to the required depth and smoothness.

On difficult surfaces, such as quarry tiles, pour some of the mixed material onto the prepared subfloor and apply a thin scrape coat using a plasterer’s trowel. Immediately pour and spread the rest of the mixture onto the subfloor in a continuous operation to a minimum of 3mm depth and a maximum depth of 5mm.

Protect surface from foot traffic prior to laying a floor covering. Ensure the compound is fully dry before applying a floor covering.

DRYING TIMES

Protect freshly applied product from strong sunlight and through draughts, as this can dehydrate the product, resulting in incorrect curing. Also, protect from rain and frost. Do not force dry the smoothing compound, as this may affect the curing process.

Application in high temperatures may result in rapid setting and poor flow. The rapid loss of water may increase the risk of cracking.

The drying time depends on how absorbent the subfloor is, the air humidity and both the ambient & floor temperatures.

Under good site conditions, Bostik Cempolatex 1 Pack will normally take foot traffic after approx. 2 to 4 hours. Leave overnight, or a minimum 16 hours before applying floor coverings. The walk on time and setting time will be delayed if the powder has been stored in temperatures below +10°C, or has been applied in temperatures below +20°C.

The working and drying times of the compound will be reduced in higher temperatures and increased in lower temperatures.

CLEANING

Clean tools and equipment with warm, soapy water immediately after use. Remove surplus compound from surfaces whilst it is still wet. Cured material can only be removed mechanically.

Bostik Cempolatex 1 Pack PRECAUTIONS IN USE

Do not use as a substitute for a DPM. An effective membrane is required to prevent water entering the system.

The mix ratios and temperatures need to be followed accurately. Changing the mix ratios will disrupt the system and risk product failure.

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