Professional use only - from the 24th August 2023, adequate training is required before industrial or professional use of this product.

Should you require training, visit - https://www.safeusediisocyanates.eu/

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• Features & Benefits
• Preparation
• Application
• Limitations

Features & Benefits

• Floors coated with Mapefloor PU 461 are particularly recommended for use in residential and public service environments such as:
  • Schools, nurseries, offices, public offices, etc
  • Hospitals and care homes
  • Libraries, museums, showrooms, etc
  • Apartments
  • Shops in general
• Two-component, coloured aliphatic polyurethane resin with high solids content developed in the MAPEI R&D laboratories
• Floors coated with Mapefloor PU 461 are elastic and resistant to UV rays, foot traffic and mild chemicals
• When used in combination with Mapecomfort FL rubber mat, floors are characterised by high level of comfort underfoot, good soundproofing properties and reduction in the transmission of noise
• Complies with the principles defined in EN 13813 “Screeds and materials for screeds - Materials for screeds - Properties and requirements”, which specifies the requirements for screed materials used in the construction of internal floors

Preparation

Preparation of the substrate

The surface of concrete floors must be dry, clean and sound and have no crumbling or detached areas. The compressive strength of the concrete used for the substrate must be at least 25 N/mm² and its pull off strength must be at least 1.5 N/mm² and must always be suitable for its intended use and the types of load to which the floor will be subjected. The level of moisture in the substrate must be a maximum of 4% and there must be no capillary rising damp (check by testing it with a sheet of polythene).

The surface of the substrate must be prepared with suitable equipment (e.g. shot-blasting or grinding with a diamond disk), to remove all traces of dirt, cement laitance and crumbling or detached areas and to make the surface slightly rough and absorbent. Before applying any material, remove all dust from the surface with a vacuum cleaner. Any cracks, holes or surface irregularities must be repaired and smoothed with epoxy resin Primer SN fillerised with quartz sand or made thixotropic with Additix PE, or epoxy mortar Mapefloor EP19 or thixotropic epoxy resin Mapefloor JA or Mapefloor JA Fast.

Before applying Mapefloor PU 461, remove all traces of dust from the surface with a vacuum cleaner. Apply Mapefloor PU 461 on cementitious substrates after applying a coat of Primer SN (for Mapefloor Comfort System AL), or over Mapecomfort FL rubber mat bonded and smoothed over with Mapefloor Pore Filler (for Mapefloor Comfort System AL/X).

Application of Primer SN (for Mapefloor Comfort System AL)

After preparing the substrate as specified, apply an even coat of Primer SN mixed with Quartz 0.5 with a flat trowel or smooth rake. Immediately after applying Primer SN, lightly broadcast the surface with Quartz 0.5 while it is still wet to ensure the next coat of resin adheres perfectly.

Bonding Mapecomfort FL (for Mapefloor Comfort System AL/X)

Bond Mapecomfort FL rubber mat in place with Mapefloor Pore Filler. Once the mat has been bonded to the substrate, skim over the surface with the same product to seal all the pores.

Preparation of the product

The two components which make up Mapefloor PU 461 must be mixed together just before application. Stir component A thoroughly with a low-speed electric mixer (300-400 revs/min) then add the content of component B. Mix components A and B with a low-speed electric mixer (300-400 revs/min) for at least two minutes until they are completely blended. Pour the mix into a clean container and briefly mix again.

Do not mix the product for too long to avoid entraining too much air into the mix. Apply the mix within the pot life indicated in the data table (refers to a temperature of +23°C). Higher surrounding temperatures will reduce the pot life of the mix, while lower temperatures will increase it

Application

Pour Mapefloor PU 461 over Primer SN or Mapecomfort FL skimmed with Mapefloor Pore Filler. Make sure there are no pores left in the surface otherwise they could form pin-holes in the surface of the coating during the hardening phase. If there are still pores visible smooth over the surface again with Primer SN or Mapefloor Pore Filler.

Spread the Mapefloor PU 461 evenly using a notched spreader to form a layer at least 2 mm thick; a spreader with triangular notches is recommended. Immediately after applying the product, go over the surface several times in different directions with a spike-roller to release any air entrained in the product during mixing.

While the material is still wet, broadcast the surface with coloured chips to create other special effects if required. We recommend using chips up to 3-4 mm in size.

If other special finishes are created by applying Mapefloor PU 461 in different colours using the wet-on-wet technique, it will not be possible to go over the surface with a spike-roller, otherwise the finish required will be affected. With these types of finish, any air bubbles that have not been removed will remain.

Within 48 hours of hardening of Mapefloor PU 461 (at +23°C), apply 2 coats of Mapefloor Finish 59 W TRP water-based, transparent, matt, UV-resistant protective polyurethane finish suitable for flexible systems by airless spray or by roller in two directions at right angles to each other.

If waiting time exceed 48 hours at +23°C from hardening of Mapefloor PU 461, slightly roughen the surface with sandpaper or emery cloth before applying the finishing coat. Make sure all traces of dust are removed from the surface with a vacuum cleaner before applying the finish.

Clean tools used to prepare and apply Mapefloor PU 461 with thinners immediately after use. Once hardened, the product may only be removed using mechanical means. Coverage: approx. 2.8 kg/m² to form a 2 mm thick layer.

Limitations

• Do not apply Mapefloor PU 461 on damp substrates or on substrates with capillary rising damp
• Do not dilute Mapefloor PU 461 with solvent or water
• Do not apply Mapefloor PU 461 on dusty or crumbling substrates
• Do not apply Mapefloor PU 461 on substrates with oil or grease stains or stains in general
• Apply Mapefloor PU 461 on substrates after preparing them according to specification and treating them with Primer SN or laying Mapecomfort FL mat
• Do not mix partial quantities of the components to avoid mixing errors; the product may not harden correctly
• Do not expose the mixed product to sources of heat
• We recommend using Mapefloor PU 461 from the same production batch to guarantee an even colour
• If rooms where the product is being applied need to be warmed up, do not use a gas or oil heater; the carbon dioxide and water vapour given off into the room will affect the shine and finish of the floor. Use electric heaters only
• Remove aggressive chemicals as soon as possible after they come into contact with Mapefloor PU 461
• Use suitable specific cleaning equipment and detergent to clean the product, depending on the type of dirt or stain to be removed
• Protect the product from water for at least 24 hours after application
• Do not apply the product directly on substrates with a moisture content of more than 4% and/or with capillary rising damp (check by testing it with a sheet of polythene)
• The temperature of the substrate must be at least 3°C above the dew-point temperature