Product Data Sheet
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Sikagard®-670 WMY

Acrylic based, water-dispersed, protective coating for concrete

Sikagard®-670 WMY is a one-part, acrylic based, water dispersed, protective coating producing a matt surface finish.

  • Good water vapour permeability
  • High diffusion-resistance to CO2, good carbonation barrier
  • Excellent resistance to weathering and ageing
  • Excellent resistance against chalking
  • Greatly reduced water absorption
  • Easy to apply
  • Excellent adhesion to many substrates
  • Ecologically and environmentally harmless
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Product Data Sheet
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Usage

For protection and embellishment of facades and fair-faced concrete without obscuring the characteristic surface texture of the concrete.  

Advantages

  • Good water vapour permeability
  • High diffusion-resistance to CO2, good carbonation barrier
  • Excellent resistance to weathering and ageing
  • Excellent resistance against chalking
  • Greatly reduced water absorption
  • Easy to apply
  • Excellent adhesion to many substrates
  • Ecologically and environmentally harmless

Packaging

  • 20 L pail
  • 200 L drum (~RAL 7032 and ~RAL 7035)

Colour

  • Pebble grey (~RAL 7032)
  • Light grey (~RAL 7035)
  • White (~RAL 9010)
  • Non-standard colours are also available upon request

Product Details

Product Information

Shelf Life

2 years from the date of production

Storage Conditions

Store in original unopened packaging in a cool, dry place. Protect from direct sunlight.

Density

~1.3 kg/l (at 20 °C)

Solid content by weight

~60 %

Solid content by volume

~45 %
Technical Information

Diffusion Resistance to Water Vapour

μH2O > 1 000

(BS EN ISO 7783:2011, Wet Cup Method A)

Chloride Ion Diffusion Resistance

Test results indicate that Sikagard®-670 WMY combined with Sikagard®-700 S improves the resistance to chloride permeability by as much as 10 times.

Permeability to Carbon Dioxide

SD > 150 m

(BS EN 1062-6:2002, Method B)

Application

Application Information

Ambient Air Temperature

+8 °C min. / +35 °C max.

Relative Air Humidity

Maximum humidity is 80 %, observe dew point.

Substrate Temperature

+8 °C min. / +35 °C max.

At rising temperatures, do not apply to concrete substrates without pore sealer.

Waiting Time / Overcoating

  • Between Sikagard®-700 MY and following coats: 5 hours min. / 1 week max.
  • Between Sikagard®-680 S Transparent and Sikagard®-670 WMY: 8 hours min.

Temperature

Minimum between coats

Rain resistant

+23 °C

~30 minutes

~60 minutes

+30 °C

~20 minutes

~40 minutes

Applied Product Ready for Use

+23 °C

~4 hours

+30 °C

~3 hours
Consumption

Consumption

2–3 coats at approximately 0.15 kg/m² per coat. Intensive colours require 3–4 coats.
For marine structures, a priming coat of Sikagard®-700 MY (0.2 kg/m² is recommended).
Application steps

APPLICATION

Sikagard®-670 WMY is supplied ready to use. However, before applying, the material must be thoroughly stirred mechanically. Sikagard®-670 WMY can be applied by brush or roller (preferably with a short piled lamb skin roller) or airless spray equipment with a pressure of 180 bar, nozzle with opening diameter of 0.38–0.66 mm and a spraying angle of 50–60°.

CLEANING OF TOOLS

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

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