Product Data Sheet Show all documents

Sikagard®-680 SG

Protective & Decorative Coating for Concrete

Sikagard®-680 SG is a one part solvent containing coating, based on acrylic resins. It is resistant to weathering, alkalis, chloride ions and ageing. It is available in coloured grades for use on mineral substrates including concrete and other cementitious surfaces.    Sikagard®-680 SG protects concrete against aggressive atmospheric influences and promotes a self-cleaning effect on the treated surfaces. It does not adversely influence the characteristic texture of the concrete.    Suitable for use in hot and tropical climatic conditions.

  • Sikagard®-680 SG provides excellent UV resistance
  • Due to its quick drying properties, the coating is rain resistant within a short time
  • Almost no change in the texture characteristics of the concrete surface
  • Sikagard®-680 SG protects the concrete against aggressive atmospheric influences, which can penetrate into the concrete in the form of salts or gases
  • Very high diffusion resistance against carbon dioxide and therefore reduces considerably the rate and depth of carbonation of the concrete
  • Water vapour permeability is not adversely affected
  • Dirt pick up is reduced and the concrete is no longer discoloured by rain
Product Data Sheet Show all documents

Usage

  • Protection and enhancement of old and new concrete and other cementitious materials on building and infrastructures elements, especially facades.
  • Protective and Finishing coat for Precast Concrete Elements
  • Protect from attack by chloride ions, sulphates and carbon dioxide.
 

Advantages

  • Sikagard®-680 SG provides excellent UV resistance
  • Due to its quick drying properties, the coating is rain resistant within a short time
  • Almost no change in the texture characteristics of the concrete surface
  • Sikagard®-680 SG protects the concrete against aggressive atmospheric influences, which can penetrate into the concrete in the form of salts or gases
  • Very high diffusion resistance against carbon dioxide and therefore reduces considerably the rate and depth of carbonation of the concrete
  • Water vapour permeability is not adversely affected
  • Dirt pick up is reduced and the concrete is no longer discoloured by rain

Packaging

25 kg pail

Colour

Thixotropic liquid, available in matt standard RAL colours (RAL7038, RAL7040, RAL1015 and RAL9003). Other RAL colours subject to minimum product order.

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

Sikagard®-680 SG is certified according "Low Emitting Materials as per Al Sa'fat - Dubai Green Building Evaluation System" by Dubai Central Laboratory (DCL) certificate No. CL17020432

APPROVALS / CERTIFICATES

Sikagard®-680 SG follows the main requirements of EN 1504-9 (for protection against ingress, moisture control and increasing the resistivity). 
Product Information

Composition

Acrylate resin in solvent

Shelf life

12 months from date of production

Storage conditions

Store in original unopened packaging in a cool and dry condition between +5 °C and +30 °C. Protect from direct sunlight, heat and condensation.

Density

~1.37 kg/l (25 °C)

(BS EN ISO 2811-1)

Dependent on colour shade, small variations are possible.

Flash Point

+32 °C

(ASTM D92)

Solid content by volume

~59 %

(ASTM D2697)
System information

System Structure

In normal situation

2 x Sikagard®-680 SG

When combined with hydrophobic impregnation priming coats

1 - 2 x Sikagard®-700 S
2 x Sikagard®-680 SG
Technical Information

Tensile Adhesion Strength

≥ 1.5 N/mm2

(ASTM D4541)

Resistance to UV Exposure

pass

(ASTM G154)

Behaviour after Artificial Weathering

Light Reflectance Value (LRV) RAL 9003

~80 %

Chloride Ion Diffusion Resistance

~99%

(ASTM C1202)

~8.7 x 10-11  cm2s-1

(ASTM C1556)

Application

Application Information

Ambient Air Temperature

+5 °C min. / +40 °C max.

Relative Air Humidity

< 85 %

Dew Point

Temperature must be at least 3 °C above dew point

Substrate Temperature

+5 °C min. / +35 °C max.

Waiting Time / Overcoating

Waiting time between coats:

Substrate temperature

Time

+ 10 °C

~8 h

+ 20 °C

~4 h

+ 30 °C~3 h

Note: Refresher coats of Sikagard®-680 SG can be applied without priming if the existing coating has been thoroughly cleaned.

Curing Treatment

Sikagard®-680 SG does not require any special curing but must be protected from rain for at least 3 hour at +20 °C.

Applied Product Ready for Use

~5 days (+20 °C)
Consumption

Consumption

~0.20 kg/m² per coat for DFT of ~85 micron

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..
Application steps

APPLICATION

For use on very dense substrates, the first coat of Sikagard®-680 SG shall be thinned with up to 10 % Sika® Thinner C.

Sikagard®-680 SG can be applied by brush or short-piled lambskin roller.

Sikagard®-680 SG can be applied by spraying, for example with Graco spray machine, model GH 675 DI. For more information please contact Sika Technical Department.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened / cured material can only be removed mechanically.

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