BestHard SP7
Premixed non metallic floor hardener, inorganic base
Advantages:
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Premixed, easy apply, high and consistent quality.
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Improves resistance to abrasion.
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Improves resistance to impact.
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Improves resistance to oils and greases.
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Improves smoothness.
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Reduces dust formation.
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BestHard SP7 is premixed powder, non-metallic floor hardener, and ready to use. It consists of very hard granular materials, polymer, special chemicals and selected Portland cement.
For special reinforcing of floor and slab surfacing in order to increase the resistance to abrasion and hence to reduce the formations of dust to severe mechanical wear such as: warehouses, quays, parking lots and mechanical engineering workshop,...
- Premixed, easy apply, high and consistent quality.
- Improves resistance to abrasion.
- Improves resistance to impact.
- Improves resistance to oils and greases.
- Improves smoothness.
- Reduces dust formation.
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Supply form/ color:
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Dry powder/ Green.
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Compressive strength:
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≥ 65MPa at 28 days. |
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Mohs hardness of aggregate:
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≥ 7 |
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Bulk density:
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1.4 kg/L |
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Consumption:
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3.0 ÷ 3.5 kg/m2 for walking area. 4.0 ÷ 4.5 kg/m2 for normal traffic area. 5.0 ÷ 5.5 kg/m2 for heavy traffic area. |
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Waiting time for working:
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Depending on the ambient temperatures and the type of cement and admixture used in the concrete, the waiting time for working of substrate can be vary a little. However, in the general condition, the waiting time should be as follow (for different using conditions):
Pedestrian traffic: 2 ÷ 3 days. Light traffic: 7
÷ 10 days. |
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Packaging:
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25 kg/bag (bag with polyethylene liners).
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Storage:
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As a basic rule it is recommended to store BestHard SP7 hardener in a dry and cool places. Do not stack more than 10 bags vertically.
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Shelf life:
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BestHard SP7 hardener powder has a shelf life of at least 12 months from the date of production with right storage conditions and unopened bag.
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APPLICATION
Preparation:
- Concrete mix design mush be corresponding with using purpose. The vibrating and leveling work should be in right way to get optimum result.
Placing:
- BestHard SP7 should be applied in two layers by hand. Approximately 2/3 of quantity should be applied in the first layer and the balance in the second one.
- After the concrete has been evaporation of bleeding water, the preliminary floating is applied to leveling the surface and preventing cement slurry from concrete onto hardener in later time.
- Disperse the BestHard SP7 powder evenly by hand on the floor surface after preliminary floating. Should apply first on floor areas where the concrete is likely to loose moisture rapidly such as: near by walls, columns, joints and doorways...
- After the applied BestHard SP7 powder darkens in color indicating absorption of moisture from the concrete and when concrete has stiffened enough to prevent the float blades from digging into the surface, float the applied surface areas
using power floats. Float just enough to bring the excess moisture to the surface. Apply second layer continuously as the first layer. Dispersing the remaining quantity of BestHard SP7 evenly on the first layer surface by hand, compensating
with extra material over areas under-applied during the first dispersing. As soon as the second layer has darkened by moisture absorption, float the surface with a power trowel equipped with float blades or disc floats.
Smooth finishing:
- For the superior smooth finish, trowel again after further stiffening of the surface with slightly raised blades, but avoid raising them to angle that creates chatter marks or blisters on the surface. If either starts to appear, remove them by reducing the angle of trowel.
Curing:
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Start curing immediately after final finishing using a liquid membrane-curing compound such as BestCure to prevent rapid evaporation of water to avoid surface split or spotted formation.
Safety:
- BestHard SP7 is non toxic but alkaline like normal cement and can cause irritation with sensitive skin. Gloves, mask, goggles should always be worn.