Sika Sikafloor CureHard 24

Sika Sikafloor CureHard 24 is a high solids, one part, clear sodium silicate based liquid to cure, harden and seal fresh or hardened concrete.

Best Uses

Sika Sikafloor CureHard 24 is ideal for horizontal old or new concrete surfaces, where a hard surface with light to moderate abrasion resistance is required. This can include warehouses, industrial plants, stores, shopping malls, parking structures, service stations, hangars etc.

CureHard 24 is also ideal for concrete slabs where no specific curing efficiency or standards are required, in both interior or exterior applications. It is also suitable for dust-proofing of prefabricated concrete elements. Suitable for protection against ingress (Principle 1, method 1.2 of EN 1504-9). Suitable for physical resistance (Principle 5, method 5.2 of EN 1504-9). Sika Sikafloor® CureHard-24 may only be used by experienced professionals.

• Ready to use
• Easy to apply
• Improved chemical and abrasion resistance compared to untreated concrete
• Reduced dusting of concrete floors
• Slightly reduces loss of water of new concrete while setting
• Improves cleanability
• Non-yellowing
• Good penetration
• Solvent free
• Colourless and odourless
• Can be applied on green concrete, without any bleed water

Application

For Fresh Concrete - Surface must be free of bleed water and of sufficient strength to withstand finishing operations. The concrete must be prepared by suitable power or manual floating / tamping techniques. Apply in a continuous film using a high volume low pressure spray unit as soon as the surface is firm enough to walk on and in sufficient quantity to keep the surface damp for at least 30 minutes. After about 30 to 45 minutes, the material begins to gel and becomes slippery. Wet the material slightly with a water spray to reduce slipperiness and rework into the surface for 10 to 20 minutes with a soft bristle broom or floor-scrubbing machine. After about 20 minutes, the material will return to a gel. Rinse the floor and remove any excess material using a squeegee, wet vacuum or mop.

Hardened / Old Concrete - Surfaces must be sound, open textured, clean, free from frost, laitance, surface water, oils, grease, coatings, all loosely adhering particles and other surface contaminants. If in doubt apply a test area first. The substrate must be prepared by suitable cleaning method such as high pressure water cleaning or by ride-on cleaning machines. Allow drying prior to application.

All dust, dirt, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and / or vacuum. Apply in a continuous film using a high volume low pressure spray unit. To ensure maximum penetration, scrub material into the surface with a soft bristle broom or floor-scrubbing machine (min. 30 minutes), until the material begins to gel and becomes slippery.

Wet the material slightly with a water spray and rework it into the surface for another 10 to 20 minutes. After this process, rinse the floor and remove any excess material using a squeegee, wet vacuum or mop. On porous, rough-textured or broom-finished surfaces, a second coat may be required. For large surfaces and higher placing rates, mechanical equipment such as ride-on cleaning machines can be also used to place, brush in and remove the excess material from the surface. Thanks to proceeding chemical reaction the rate of water-tightness increases gradually, whereas maximum sealing and hardening effect occurs earliest after 7 days. Gloss of the surface gradually increases during 30 to 90 days depending upon cleaning frequency.

For best results with new concrete floors wait for 7–14 days after placement or until after cement has sufficiently hydrated prior to treatment with Sika Sikafloor CureHard 24.