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• Features & Benefits
• Preparation & Application
• Limitations

Features & Benefits

• Used for internal and external car-parks and concrete substrates with cracks or risk of cracking that require a coating with a high degree of elasticity
• Used in the Mapefloor Parking System HE cycle to form an elastic protective and waterproof coating on road surfaces in multi-storey car-parks and on roofs and surfaces with vehicle access, including external surfaces
• Also used in the Mapefloor Parking System ME cycle to form an elastic protective and waterproof coating on road surfaces for the intermediate levels in multi-deck carparks.
• Two-component, coloured, fillerized polyhuretane resin-based formulate, according to a formula developed in the MAPEI research laboratories
• Excellent crack-bridging capacity for cracks that have already appeared or that could potentially form in substrates, even at temperatures down to -20°C
• Also has good resistance to mechanical stresses and loads

Preparation & Application

Surface Preparation

The surface of concrete 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 tensile strength must be at least 1.5 N/mm². The strength of the substrate must also be suitable for its final use and the types of load to which it 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 floor 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 the product remove all dust from the surface with a vacuum cleaner. Any cracks must be repaired by filling them with Eporip, while any deteriorated areas of the concrete must be repaired with Mapefloor EP19.

Before applying Mapefloor PU 400 LV, remove all traces of dust from the surface with a vacuum cleaner.

Application of Primer SN

Apply an even coat of neat Primer SN or mixed with Quartz 0.5 on the substrate after it has been prepared as specified with a straight steel trowel or rake. Immediately after applying Primer SN broadcast the surface in excess with Quartz 0.5 while still wet to ensure the resin coating adheres perfectly. Once the primer has hardened, remove all excess sand before applying Mapefloor PU 400 LV.

Preparation of the product

The two components which make up Mapefloor PU 400 LV must be blended together just before application. Mix component A thoroughly and add the contents of component B. Mix again with a suitable electric mixer at low speed (300-400 revs/min) to prevent entraining air into the product for at least 2 minutes until the mix is completely blended. Then, while mixing, add 20-30% by weight of Quartz 0.25 and keep mixing until it is evenly blended. Pour the mix into a clean container and briefly mix again. Do not overmix 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 +20°C). Higher surrounding temperatures will reduce the pot life of the mix, while lower temperatures will increase its pot life.

Application

Pour the product on the surface and spread it out evenly over the entire surface to be treated with a notched spreader; then go over the surface with a spiked roller. When applying the Mapefloor Parking System ME cycle, broadcast the surface in excess with Quartz 0.9 or Quartz 1.2 according to the degree of non-slip finish required. Once the product has hardened, remove all excess sand before applying the finishing coat.

Consumption: from 1.5 to 2 kg/m² of Mapefloor PU 400 LV, depending on the condition of the substrate.

Limitations

• Do not apply Mapefloor PU 400 LV on substrates not adequately prepared and primed as specified
• Do not apply Mapefloor PU 400 LV on substrates with more than 4% moisture content or on substrates with capillary rising damp (consult Mapei Technical Services)
• Do not dilute Mapefloor PU 400 LV with solvent or water
• Do not apply Mapefloor PU 400 LV on dusty or crumbling substrates
• Do not apply Mapefloor PU 400 LV on substrates with oil or grease stains or with stains in general
• Do not mix partial quantities of the components to avoid mixing errors; the product may not harden correctly
• Protect the product from water for at least 24 hours after application
• The temperature of the substrate must be at least 3°C above dew point to reduce the risk of condensation
• Do not expose the mixed product to sources of heat
• If areas where the product is being applied need to be warmed up, use electric heaters only (heaters that run on fossil fuels give off carbon dioxide and water vapour that could affect the finish of the coating)