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SIKAGARD ELASTOCOLOR-675W

Protective coating for exposed concrete

Product Description:

Sikagard® ElastoColor-675 W is a one part, plasto-elastic water dispersed coating based on a styrene acrylate dispersion for the protection and enhancement of fair faced concrete.
Sikagard® ElastoColor-675 W can be applied over existing coatings or directly onto the concrete surfaces.

Uses:

    Protection and enhancement of concrete structures (normal and lightweight
    concrete), especially exposed concrete surfaces with a risk of cracking
    For use with concrete repair works as an elastic protective coating on Sika
    levelling mortar (refer to your
    product / system data sheet)
    For fibre cement and overcoating of existing soundly adhering coatings

Characteristics / Advantages:

    Water vapour permeable
    Very good resistance against weathering and ageing
    Very good chalking resistance
    Easy application
    Can be diluted with water
    High covering power (good opacity)
    Environmentally friendly (solvent free)
    Prevents water ingress
    High diffusion resistance to CO2 (carbon dioxide)

Product Data:

Form:

Appearance / Colours Thixotropic liquid available in almost every colour shade.
Packaging 15 l pails

Storage:

Storage Conditions / Shelf-Life
12 months from date of production if stored properly in undamaged and unopened original sealed packaging in cool and dry conditions. Protect from direct sunlight and frost.

Technical Data:

Chemical Base Styrene acrylate dispersion
Density ~ 1.30 kg/l (at +20°C)
Solid Volume ~ 44%
Solid Content ~ 61%

Layer Thickness Dminp (minimum required thickness to achieve the CO2 equivalent air thickness of 50 m) = 60 microns Dmaxp (maximum required thickness not to go beyond the H2O equivalent air thickness of 4 m) = 1300 microns Dry film thickness d = 149 μm Equivalent air layer thickness SD, CO2 = 138 m Diffusion coefficient CO2 μCO2 = 9.3 x 105 Requirements for protection _ 50 m

Carbon Dioxyde Diffusion Coefficient
(μCO2)
Dry film thickness d = 167 μm
Equivalent air layer thickness SD, H2O = 0.72 m
Diffusion coefficient H2O μH2O = 4300
Requirements for breathability _ 4 m

Water Vapour Diffusion
Coefficient (μH2O)

System Information:

Normal absorbent concrete and/or well cured thin layer Sika renders (Sika® MonoTop®-620, Icoment-520 etc.): System Product Number of applications Priming Sikagard® ElastoColor-675 W + 15% H2O diluted 1 Top coat* Sikagard® ElastoColor-675 W 2

Smooth non absorbent concrete:
Priming Sikagard®-551 S Elastic Primer 1 Top coat* Sikagard® ElastoColor-675 W 2

Absorbent fair faced concrete: Priming Sikagard®-552 W Aquaprimer 1 Top coat* Sikagard® ElastoColor-675 W 2

Splash zones, concrete exposed to de-icing salt splashes:
Priming Sikagard®-702 W Aquaphob (wet on wet) or other Sika hydrophobic impregnation 1- 2
Top coat* Sikagard® ElastoColor-675 W 2

System Structure:

Note*: With intensive yellow or red colour shades and/or a dark substrate, more than two coats might be required.

Application Details:

Product Per coat
Sikagard®-551 S Elastic Primer ~ 0.10 - 0.15 kg/m2
Sikagard®-552 W Aquaprimer ~ 0.10 - 0.15 kg/m2
Sikagard®-702 W Aquaphob ~ 0.15 - 0.20 kg/m2
Sikagard® ElastoColor-675 W ~ 0.20 - 0.25 kg/m2

Consumption:

Substrate Preparation Exposed concrete without existing coating:
The surface must be dry, sound and free from loose and friable particles.
Suitable preparation methods are steam cleaning, high pressure water jetting or blast cleaning. New concrete must be at least 28 days old.

If required, a levelling pore sealer (e.g. Sika® MonoTop®-620, Icoment-520, Sikagard®-545 W Elastofill, Sikagard®-526 Porefiller etc.) should be applied. For cement based products, allow a curing time of at least 4 days before coating.

Exposed concrete with existing coating:
Existing coatings must be tested to confirm their adhesion to the substrate - adhesion test average > 0.8 N/mm2 with no single value below 0.5 N/mm2.

Inadequate adhesion: Existing coatings must be completely removed by suitable methods and the substrate must be sufficiently sound and suitable to be coated as above. Adequate adhesion: Thorough cleaning of all surfaces by steam cleaning or high pressure water jetting

For water based coating, use Sikagard-552 W Aquaprimer as primer. For solvent based coating, use Sikagard-551 S Elastic Primer as primer. In case of doubt, carry out adherence testing to determine which primer is most suitable -- wait at least 2 weeks prior to conduct the adhesion test -- an average value of 0.8 N/mm² is required with no single value below 0.5 N/mm².

Application Conditions / Limitations:

Substrate Temperature +8°C min. / +30°C max.
Ambient Temperature +8°C min. / +30°C max.
Relative Air Humidity < 75%
Dew Point Temperature must be at least 3°C above dew point
Application Instructions

Mixing:

The product is supplied ready for use and must be not thinned unless the 1st coat is used as a primer (refer to coating system structures). In these instances, add up to 15% of water and mix thoroughly. Un-thinned material must be stirred up thoroughly prior to application.

Application Method / Tools:

Sikagard® ElastoColor-675 W can be applied by brush, roller or airless spray. For airless spray application:

Pressure: ~ 150 bar Nozzle bore: 0.38 – 0.53 mm Spray angle: ~ 50 – 80°

Cleaning of Tools Clean all tools and application equipment with water immediately after use.

Hardened / cured material can only be mechanically removed. For Sikagard®-551 S Elastic Primer use Sika Thinner C.

Waiting Time / Overcoatability:

Waiting time between coats at +20°C substrate temperature:

Previous coating Waiting time Next coating
Sikagard®-552 W Aquaprimer 12 hours min. Sikagard® ElastoColor-675 W
Sikagard®-551 S Elastic Primer 18 hours min. Sikagard® ElastoColor-675 W
Sikagard®-702 W Aquaphob 5 hours min. Sikagard® ElastoColor-675 W
Sikagard® ElastoColor-675 W 1 hour min. Sikagard® ElastoColor-675 W

Note: A refresher coat of Sikagard® ElastoColor-675 W can be applied without priming if the existing coat has been thoroughly cleaned.

Notes on Application / Limitations:

Do not apply when there is: - Expected rain- Relative humidity > 75%- Temperature below +8°C and/or below dew point- Concrete younger than 28 days The system is resistant to aggressive atmospheric influences.

Curing Details:

Curing Treatment Sikagard® ElastoColor-675 W does not require any special curing but must be protected from rain for at least 2 hours at +20°C.

Applied Product ready for use
Final drying: ~ 14 hours at +20°C

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.

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.

Sikagard Elastocolor 675W / Anti-carbonation coatings
Concrete Renovations - Concrete Repair Specialists

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12 Fenlake Business Centre, Fengate, Peterborough , PE1 5BQ

01733 560362

sales@concreterenovations.co.uk

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