Sikafloor® -CureHard-24 Transparent surface hardener, dust proofer, sealing and curing compound for concrete
发布时间：2023/05/21
Product Data Sheet
Edition 03/03/2012 EN
Sikafloor® -CureHard-24
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Sikafloor® -CureHard-24
Sikafloor® -CureHard-24
Transparent surface hardener, dust proofer,
sealing and curing compound for concrete
Product
Description
Sikafloor® -CureHard-24 is a one part, clear liquid based on sodium silicate to cure,
harden and seal fresh or hardened concrete.
Uses
Horizontal old or new concrete surfaces, where a hard surface with light to
moderate abrasion resistance is required e.g. warehouses, industrial plants,
stores, shopping malls, parking structures, service stations, hangars etc.
On concrete slabs where no specific curing efficiency or standards are
required
Suitable for interior or exterior applications
Characteristics /
Advantages
Ready to use
Easy to apply
Improved chemical and abrasion resistance compared to untreated concrete
Reduced dusting of concrete floors
Reduced loss of water of new concrete while setting
Improves cleanability
Non-yellowing
Good penetration
Solvent free
Colourless and odourless
Environmentally friendly
Tests
Approval / Standards
Test report from GEOCISA Ref. P-02/01457 dated May 23 rd, 2002.
Water retention according to ASTM C-156
Product Data
Form
Appearance / Colours
Clear liquid
Packaging
25 l metal pails 200 l metal drums.
Storage
Storage Conditions /
Shelf Life
24 months from date of production, if stored properly in original, unopened and
undamaged sealed packaging, in dry conditions at temperatures between +5°C and
+30°C. Protect from frost.
Technical Data
Chemical Base
Sodium silicate water dilution.
Construction2
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Sikafloor® -CureHard-24
Density
~ 1.2 kg/l (at +20°C)
(ASTM C - 156)
Loss of water
g/100 cm²
Loss of water compared
to ASTM C309
(100% = 5.5 g / 100
cm²)
Loss of water compared
to untreated concrete
(100% = 18.7 g / 100
cm²)
Sikafloor® -CureHard-24
10.92 198.5% 58.4 %
Curing Efficiency
Solid Content
~ 24% (by weight)
Mechanical / Physical
Properties
Abrasion Resistance
35% increase in abrasion resistance compared to C25 concrete
(Taber Abraser, H-22 Wheel, 1000 g / 1000 cycles) (ASTM D-4060)
Resistance
Chemical Resistance
The product is not intended for chemical exposure.
System
Information
System Structure
Curing compound 1 - 2 coats
Hardener / Sealer 1 - 2 coats
Application Details
Consumption / Dosage
0.15 - 0.25 l/m2 /coat (4 - 7 m2 /l/coat).
This figure is theoretical and does not include for any additional material required
due to surface porosity, surface profile, variations in level and wastage etc.
Substrate Quality
Fresh concrete:
Surface must be free of bleed water and of sufficient strength to withstand finishing
operations.
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.
For best results, concrete floors must be treated with Sikafloor® -CureHard-24 at
least 7 - 14 days after their placement or after the cement has had sufficient time to
hydrate.
Substrate Preparation
Fresh concrete:
The concrete must be prepared by suitable power or manual floating/tamping
techniques.
Hardened / old concrete:
The substrate must be prepared by suitable mechanical preparation techniques
such as high pressure water or abrasive blast cleaning equipment.
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. 3
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Sikafloor® -CureHard-24
Application
Conditions /
Limitations
Substrate Temperature
+5°C min, +35°C max.
Ambient Temperature
+5°C min, +35°C max.
Substrate Moisture
Content
Can be applied on green concrete, without any bleed water.
Relative Air Humidity
100% r.h. max.
Dew Point
Beware of condensation!
The substrate and uncured floor must be at least 3°C above dew point to reduce
the risk of condensation or blooming on the floor finish.
Application
Instructions
Mixing
Product is supplied ready to use.
Application Method /
Tools
Fresh Concrete:
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 ~ 30 to 45 minutes, the material begins to gel and becomes slippery. Wet the
material lightly with a water spray to reduce slipperiness and rework into the surface
for 10 - 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 Concrete:
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 material begins to gel and
become slippery. Wet the material lightly with a water spray and rework it into the
surface for another 10 - 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.
Cleaning of Tools
Clean all tools and application equipment with water immediately after use.
Hardened / cured material can only be removed mechanically.
Where 2 coats are required to ensure maximum densification the second coat can
be installed 2 - 4 hours following the first.
Allow previous coats to become tack free before applying additional coats.
Temperature Time
+5°C ~ 4 hours
+10°C ~ 3.5 hours
+20°C ~ 3 hours
+25°C ~ 2 hours
Waiting Time /
Overcoating
Times are approximate and will be affected by changing ambient conditions
particularly temperature and relative humidity. 4
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Sikafloor® -CureHard-24
Notes on Application /
Limitations
In hot weather (above +25°C) store Sikafloor® -CureHard-24 in a cool place prior to
use.
In low temperatures (below +10°C) the product may thicken and be difficult to
spray.
Do not use sprayers, which have been used to spray silicones or release agents.
Do not mix differing formulations of Sika® or other curing membranes.
Ensure spraying equipment is cleaned thoroughly before use and residues of
previous membranes are removed.
Sikafloor® -CureHard-24 must be removed mechanically prior to the application of a
coating system.
Sikafloor® -CureHard-24 will increase abrasion resistance compared to untreated
concrete of the same type.
Immediately wash over-spray from glass, aluminium or highly polished surfaces
with water to avoid etching of surfaces.
Do not use on substrates treated previously with curing agents, membrane forming
sealers or asphalt until these layers have been removed completely.
Only use as curing compound for unregulated specification application.
Gelification time may be increased at low temperatures (below +10°C), high
humidity (from 80% to 100%) or wind free conditions.
In hot weather conditions (above +25°C), gelification may occur before material has
penetrated sufficiently. In such case, apply additional Sikafloor® -CureHard-24 to
keep the surface wet for the recommended 30 minutes.
When applying, leave no dry spots in order to have homogenous performance.
Touch up where necessary.
For both old and new concrete, thoroughly wash and remove off residue or excess
material. This is important as it is difficult to do so if allowed to dry and may result in
unsightly white stains. This residue solution is non toxic and can be emptied into a
sanitary sewer.
Performance enhancement of the substrates will vary greatly depending on the age,
cement content, humidity content, porosity and penetration of the product into the
substrate.
Sikafloor® -CureHard-24 will not compensate for poor substrates with low cement
content. It is not intended for substrates which are lightweight or extremely porous
or have worn (aggregate exposed) surfaces.
Sikafloor® -CureHard-24 will not hide serious staining or excessive wear.
Curing Details
Substrate temperature +10°C +20°C +30°C
Fully serviceable
~ 6 hours
~ 5 hours
~ 4 hours
Applied Product ready
for use
Note: Times are approximate and will be affected by changing ambient and
substrate conditions.
Cleaning /
Maintenance
Methods
To maintain the appearance of the floor after application, Sikafloor® -CureHard-24
must have all spillages removed immediately and must be regularly cleaned using
rotary brushes, mechanical scrubbers, scrubber dryers, high pressure washers,
wash and vacuum techniques, etc., using suitable detergents and waxes.
Value Base
All technical data stated in this Product Data Sheet are based on laboratory tests.
Actual measured data may vary due to circumstances beyond our control. 5
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Sikafloor® -CureHard-24
Local Restrictions Please note that as a result of specific local regulations the performance of this
product may vary from country to country. Please consult the local Product Data
Sheet for the exact description of the application fields.
Health and Safety
Information
For information and advice on the safe handling, storage and disposal of chemical
products, users should refer to the most recent Material Safety Data Sheet
containing physical, ecological, toxicological and other safety-related data.
Notes:
The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in
good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under
normal conditions in accordance with Sika’s recommendations. In practice, the differences in materials, substrates and actual
site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability
arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written
recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended
application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties
must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the
most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request.
Sika (China) Ltd.
No.28 Jingdong Road, Suzhou Industrial Park,
JiangSu, P.R.China
Postal Code: 215121
ISO 9001: 2008 ISO 14001:2004
Certificate No.:CC3576 Certificate No.:CC3577
The product is manufactured under a HKQAA
ISO9001/ISO14001
certified quality/environmental management system.
Construction
Construction