Sikafloor® CureHard-24

• Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4 — 1 point

• Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by Institut für Bauen und Umwelt e.V. (IBU)

• CE marking and declaration of performance based on EN 1504-2:2004 Products and systems for the protection and repair of concrete structures — Surface protection systems for concrete — Impregnation

Sodium silicate water dilution

24 months from date of production

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +40 °C. Always refer to the packaging.

Refer to the current Safety Data Sheet for information on safe handling and storage.

24 %

Abrasion tests conducted on samples of C(0.70) concrete according to EN 1766:2000.

81.5 % increase in abrasion resistance compared to untreated sample.

Applied to a sample MC(0.70) concrete according to EN 1766:2000

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.

Strength development and the curing period are dependant on the following factors:

• Concrete composition

• Fresh concrete temperature

• Ambient conditions

• Concrete dimensions

0.15–0.25 L/m² per coat (4–7 m²/L per coat) on power trowelled concrete

Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply the Product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.

Unsuitable substrate conditions for application

Note: The Product will not compensate for poor substrates with low cement content.

Note: It is not intended for substrates which are lightweight, extremely porous, or have worn surfaces with exposed aggregates.

Note: It will not hide serious staining or excessive wear.

FRESH CONCRETE ≥ 7 DAYS

The fresh concrete curing period must be long enough for the surface to achieve structural strength and impermeability sufficient to provide the required concrete durability and corrosion protection of the steel reinforcement.

HARDENED OR OLD CONCRETE

Cementitious substrates must be structurally sound, clean, dry and free of contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.

If in doubt apply a test area first.

IMPORTANT

Poor penetration and adhesion due to existing surface treatments

Concrete surfaces with existing applications of curing agents, membrane-forming sealers, or asphalt will affect the Product's penetration depth and performance.

1. Completely remove any existing surface treatments from the concrete prior to application.

FRESH CONCRETE

1. Finish the concrete using power floating, manual floating or tamping techniques.
2. Cure the concrete for at least 7 days with waterspray, blankets or plastic sheets.

HARDENED OR OLD CONCRETE

1. Clean the concrete surface with water using high-pressure cleaners or ride-on cleaning machines.
2. Allow the cleaned substrate to completely dry.
3. Completely remove all dust, dirt, loose and friable material from all surfaces with a brush or vacuum cleaner.

IMPORTANT

Damage to non-concrete substrates due to etching

If left in contact with glass, aluminium, or highly polished finishes, the Product can etch the surface.

1. Immediately wash off overspray with water from surfaces that are not to be treated.

Hot weather working above +25 °C

Note: In hot weather conditions, gelling may occur before material has penetrated sufficiently.

1. Store the Product in a cool place prior to use.
2. Apply additional material to keep the surface wet during the scrubbing application process.

Cold weather working below +10 °C

Note: At low temperatures the product may thicken and be difficult to spray.

1. Observe the recommended storage and application temperatures.

Exposing the treated surface to moisture after application

Note: Exposure to moisture before the Product has fully reacted with the concrete surface can cause efflorescence. Efflorescence can only be removed from the surface mechanically.

1. Protect the treated concrete surface from moisture for at least 3 days after application.

Preconditions

The spraying equipment has been thoroughly cleaned to remove any residue of previous membranes.

1. IMPORTANT Do not use sprayers that have previously been used to spray silicones or release agents. Apply the Product in a continuous film using a high-volume, low-pressure spray unit. Note Touch up any dry spots on the surface where necessary.
2. Scrub material into the surface with a soft bristle broom or floor-scrubbing machine for a minimum of 30 minutes, until the material begins to gel and becomes slippery. Note Gelification time may be increased at low temperatures (below +10 °C), high humidity (from 80 % to 100 %) or wind-free conditions.
3. Wet the material slightly with a water spray and rework it into the surface for another 10 to 20 minutes.
4. IMPORTANT Dried residue or excess material will leave white stains that can only be removed mechanically. After about 20 minutes, when the material has returned to a gel, rinse the floor and remove any excess material using a squeegee, wet vacuum or mop.
5. On porous, rough-textured or brush-finished surfaces, a second coat is required. Note Apply the second coat after the first one is dry and tack-free.
6. For large surfaces, ride-on cleaning machines can be used to place, brush in and remove the excess material from the surface.
7. After cure abrade the surface mechanically prior the application of a subsequent coating system. Note Use light to heavy shot blasting depending on the depth of the Product penetration.

Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.