FOX HARDTOP® FF300 KORUNT is a single-component, coloured, ready-to-use surface hardener composed of cement, specially selected corundum aggregate, pigments and additives, applied by broadcasting in dry powder form onto freshly trowelled concrete surfaces. It meets the TS EN 13813:2004 CT-C50-F7-A9 requirements.
Colour Palette
Natural
Packaging
25 kg
Product Description
FOX HARDTOP® FF300 KORUNT is a single-component, coloured, ready-to-use dry shake surface hardener composed of cement, specially selected corundum aggregate, pigments and additives. It is applied by broadcasting onto freshly trowelled concrete and screed surfaces. Thanks to the modified polymers it contains, it absorbs the bleed water from the concrete and, after trowelling, forms a monolithic structure with the concrete. It provides a surface that is 4–6 times more durable than a standard concrete surface. It meets the CT-C50-F7-A9 requirements of TS EN 13813:2004; its reaction-to-fire classification under EN 13501-1 is A1fl. The product prevents surface dusting and is also resistant to freeze–thaw cycles. It is available in a variety of colour options, primarily Natural, Grey, Anthracite, Green, Red and Blue.
Advantages
- Easy to apply.
- The treated surface is 4–6 times more durable than a standard concrete surface.
- Thanks to the modified polymers it contains, it absorbs the bleed water from the floor concrete to which it is applied and, after trowelling, forms a monolithic structure with the concrete.
- Prevents surface dusting.
- Available in colour options.
- Easier to clean than a standard concrete surface.
- Resistant to freeze–thaw cycles.
Usage Areas
- Indoors and outdoors
- Warehouses and Hangars
- Garages
- Open and covered car parks
- Shopping centres and public areas
- Factories and workshops
Application Steps
- 1
Surface Preparation
The compressive strength of the concrete to be treated must be at least 25 N/mm² (C25). Concrete slump values should be between 75–100 mm, cement content 300–350 kg/m³, and slab thickness at least 15 cm. Air-entrained concrete surfaces are not suitable for surface hardener application.
- 2
Primer Application
In monolithic screed applications, FOX BINDER FM125 must be applied as a primer to the roughened concrete surface before casting begins, in order to ensure adhesion between the existing concrete and the new screed. For floating screed applications, a polyethylene sheet must be laid over the existing concrete to prevent the new screed from bonding to it.
- 3
Joint Edge Preparation
Before application, approximately 5×5 cm of concrete must be cut away at the joint edges of the anodes and removed with a trowel. FOX HARDTOP® FF300 KORUNT mixed with a small amount of water to form a mortar must be applied to these voids. This procedure prevents the joint edges from breaking under load.
- 4
First Broadcast (2/3 of Consumption)
Broadcasting should begin only after the concrete has hardened to the point where walking on it leaves a footprint approximately 0.5–1.5 cm deep. Two-thirds of the total consumption must be distributed evenly and homogeneously over the surface without broadcasting over long distances, and levelled with a screed bar.
- 5
Moistening, Waiting and Disc Trowelling
The material must be allowed to absorb the bleed water from the concrete and become moist (change colour). Disc trowelling (helicopter pan trowelling) must then be carried out sufficiently to ensure the surface hardener integrates with the concrete.
- 6
Second Broadcast (1/3 of Consumption)
The remaining 1/3 of the material is spread over the surface in the same manner and disc trowelling is repeated. Any excess or overflowing material during trowelling must be removed with a spatula.
- 7
Fine Trowelling (Final Finish)
Finally, fine trowelling (blade trowelling) is carried out and the process is continued until the surface achieves the desired finish.
- 8
Curing Application
After application is complete, a curing compound must be applied to prevent cracking and dusting. Curing must be carried out under both summer and winter conditions. Contact FOX Bau Technical Service for suitable curing products.
- 9
Joint Cutting and Filling
After the concrete has hardened sufficiently, joints of at least 4 mm width must be cut at construction joints and filled with PU sealant to prevent cracking and dusting.
- 10
Tool and Equipment Cleaning
Tools and equipment used must be cleaned with water immediately after application is complete. Once FOX HARDTOP® FF300 KORUNT has hardened, it can only be removed from the surface by mechanical means.
Critical
Once application is complete, a curing compound must be applied to prevent cracking and dusting. Curing must be carried out in both summer and winter conditions.
Critical
After the concrete has hardened sufficiently, joints of at least 4 mm width must be cut at construction joints. To prevent cracking and dusting, these joints must be filled with PU sealant.
Critical
Broadcasting should begin only after the concrete has hardened to the point where walking on it leaves a footprint approximately 0.5–1.5 cm deep; failure to observe this timing will adversely affect product performance.
Critical
Air-entrained concrete surfaces are not suitable for the application of a surface hardener.
Important
In hot weather, application must be carried out quickly; in cold weather, care must be taken as the setting time is extended.
Important
To prevent segregation of the aggregates in the product, it must not be broadcast over long distances during application.
Important
Opened packaging must be resealed and consumed within 1 week.
Important
The product must be stored in its original unopened packaging, in a cool and dry environment, protected from frost, at temperatures between +5°C and +30°C.
Important
For short-term storage, pallets must not be stacked more than 3 high; for long-term storage, pallets must not be stacked on top of one another.
Critical
Work clothing, protective gloves, goggles and a mask must be worn during application. Contact with skin and eyes must be avoided; in case of contact, wash thoroughly with plenty of water and soap. If swallowed, seek medical attention immediately.
Critical
It is dangerous to approach storage and application areas with open flames; areas must be ventilated.
Important
Food and beverages must not be brought into application areas. The product must be stored out of reach of children.
Information
The technical values above are given for +23°C and 50% relative humidity conditions. Higher temperatures shorten the time; lower temperatures extend it.
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