Product Data Sheet Show all documents

Sikafloor® CureHard GL

Sealing lithium silicate based crystalline agent with high gloss

Sikafloor® CureHard GL is water-soluble agent based on lithium silicate and acrylate dispersion for sealing and additional curing of existing power trowelled or
polished/grinded concrete surfaces. Compared to similar products based on sodium or potassium silicate, that product in possible overdose is less prone to the formation of persistent efflorescence.

Silicate component of the product - when applied onto concrete surface - penetrates into its texture, wherein it initiates chemical reaction and subsequent crystallization of reaction products which result in filling the concrete surface pores. Acrylic dispersion fills surface pores and this way reduces the absorption of the concrete during the first days after application. Sikafloor® CureHard GL bring followinh advantages when applied:
  • appearance enhancement of concrete floors
  • silk gloss
  • dust reduction
  • sealing and impregnation of concrete surface
  • easier cleaning
  • solvent free, no odour
Product Data Sheet Show all documents

Usage

Sikafloor® CureHard GL improves durability and tightness of concrete surface and gives the concrete surface silk gloss. Compared to current crystalline sodium or potassium based hardeners - the lithium based preparations eliminate occurrence of possible efflorescence on the concrete surface. The result of regular cleaning in the form of simple machine washing is high gloss of the flooring surface, which positively influences aesthetic quality of the work. Can be repeatedly used as floor maintenance agent, without additional mechanical substrate preparation.  

Advantages

Silicate component of the product - when applied onto concrete surface - penetrates into its texture, wherein it initiates chemical reaction and subsequent crystallization of reaction products which result in filling the concrete surface pores. Acrylic dispersion fills surface pores and this way reduces the absorption of the concrete during the first days after application. Sikafloor® CureHard GL bring followinh advantages when applied:
  • appearance enhancement of concrete floors
  • silk gloss
  • dust reduction
  • sealing and impregnation of concrete surface
  • easier cleaning
  • solvent free, no odour

Packaging

25 l container, 200 l drum

Colour

Milky white liquid.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Declaration of Performance No. 0208150101100000081180, certified by Factory Production Control Body No.1020 and provided with CE-mark. Surface Protection Product – Impregnation according to EN 1504-2. Intended Use – Table ZA.1b and 1.c of EN 1504-2:2004. Conforming to the Annex ZA Table ZA.3a.
Product Information

Chemical Base

Lithium silicate modified by acrylic resin.

Shelf Life

12 months from date of production if stored properly in undamaged, unopened, original sealed packaging.

Storage Conditions

Storage at temperatures between +5°C and +30°C. Protect from direct sunlight, frost and contamination.

Density

~ 1.08 kg/litre (at +20°C)

Solid content by weight

~ 19 M.-%
Technical Information

Abrasion Resistance

Increased by 48 % compared to untreated sample

EN ISO 13892-4

Resistance to Impact

(class III: ≥ 20 Nm)

EN 6272-1

Tensile Adhesion Strength

≥1.0 MPa

EN 1542

Penetration Depth

≥5 mm

EN 1766

Water Absorption

<0,1 kg/m2h0,5

EN 1062-3

Application

Application Information

Ambient Air Temperature

≥2 °C

Substrate Temperature

≥5 °C

Waiting Time / Overcoating

Temperature [°C]

Time [hour]

+5

~ 3.5

+10

~ 3.0
+20~ 2.0
+25~ 1.5

Where 2 coats are required to ensure maximum densification the second coat can be installed after the first one is dry. Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Drying Time

The surface is touch-dry after 2 hours at +20 °C.
Consumption

Consumption

0.05 – 0.10 l/m2 (i.e. 10 – 20 m2/l, on power trowelled concrete)
Application steps

SUBSTRATE QUALITY

Sikafloor® CureHard GL is designed to be applied exclusively on hardened concrete/cementitious surfaces. Surfaces must be sound, clean, free from frost, laitance, surface water, oil, 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 GL at least 28 days after their placement or after the cement has had sufficient time to hydrate. Sikafloor® CureHard GL can also be applied on grinded/polished concrete or cement based screed surfaces, on concrete tiles or on stamped concrete surfaces.

APPLICATION

Sikafloor® CureHard GL must be applied in specified quantity by means of mechanical or manual pressure sprayer with adjustable nozzle. Immediately after that it should be evenly spread with a flat micro–fibre swab. Sealer reminders that are not well spread may cause white spots. To improve efficiency, achieve gloss and visual unification of the area second layer of the product should be applied the same way after the first one is dry.  Thanks to proceeding chemical reaction the rate of water-tightness increases gradually, whereas maximum sealing and hardening effect occurs earliest after 7 days. To achieve high glossy surface additional polishing with soft PAD is possible. The surface must be absolutely dry in case of polishing; minimal 24 hours surface drying is a must. The product can be used in combination with Sikafloor® CureHard -24 and Sikafloor® CureHard LI.

CLEANING OF TOOLS

Flush sprayers and nozzles should be thoroughly cleaned with clear water. Do not use sprayers that were used for spraying with silicones or release agents (oils).

CLEANING

To maintain the appearance of the floor after application, Sikafloor® CureHard GL 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.

 

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