Product Data Sheet Show all documents
Sikagard®-550 W Elastic

Sikagard®-550 W Elastic

CRACK BRIDGING, ANTI-CARBONATION PROTECTIVE COATING FOR CONCRETE

Sikagard®-550 W Elastic is a one component, plasto-elastic coating based on UV-curing acrylic dispersion with excellent crack-bridging properties even at temperatures below 0 °C.
Sikagard®-550 W Elastic complies with the requirements of EN 1504-2 as protective coating.

  • Crack-bridging even at low temperatures (-20°C)
  • High diffusion resistance against CO2 reducing the rate of carbonation
  • Water vapour permeable
  • Very good resistance against weathering and ageing
  • Environmentally friendly (solvent free)
  • Reduced tendency to dirt pick up and contamination
Product Data Sheet Show all documents

Usage

Sikagard®-550 W Elastic is used for protection and enhancement of concrete structures (normal and lightweight concrete), especially exposed outdoor concrete surfaces with a risk of cracking.
Sikagard®-550 W Elastic is used with concrete repair works as an elastic protective coating on Sika® smoothing mortar (refer to relevant product / system data sheet), fibre cement and overcoating of existing soundly adhering coatings
  • Suitable for protection against ingress (Principle 1, method 1.3 of EN 1504-9),
  • Suitable for moisture control (Principle 2, method 2.3 of EN 1504-9)
  • Suitable for increasing the resistivity (Principle 8, method 8.3 of EN 1504-9)
  •  

Advantages

  • Crack-bridging even at low temperatures (-20°C)
  • High diffusion resistance against CO2 reducing the rate of carbonation
  • Water vapour permeable
  • Very good resistance against weathering and ageing
  • Environmentally friendly (solvent free)
  • Reduced tendency to dirt pick up and contamination

Packaging

15 lt plastic pail

Colour

Thixotropic liquid available in almost every colour shade.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

EN 1504-2 performance testing, LPM Report A-33’882-2 dated July 09
The product is included in a compilation of tested products and systems as per
OS 5a (OS DII) at the German Institute of Road Systems
Determination of dynamic crack bridging properties according to EN 1062-7, report P8690a dated 27/08/2014, Kiwa Polymer Institut GmbH

Protective coating according to EN 1504-2, DoP 02 03 03 03 002 0 000003 1125; certified by Factory Production Control Body: 0921; certificate 0921-BPR-2046 and provided with the CE-mark
Product Information

Composition

Acrylate dispersion

Shelf life

24 months from date of production if stored properly in undamaged and unopened original sealed packaging.

Storage conditions

Store in cool and dry conditions. Protect from direct sunlight and frost.

Density

~ 1.30 kg/l (at +20°C)

Solid content by mass

~ 65%

Solid content by volume

~ 53%
System information

System structure

System

Product 1)

Number of applications

Priming 2)

Sikagard®-552 W Aquaprimer

1

Top coat 3)Sikagard®-550 W Elastic2 – 3

 
Technical Information

Crack bridging ability

Class A1 (-20°C) - 2 coats

(EN 1062-7)

Class B2 (-15°C) - 3 coats

 

Dry Film Thickness

310 µ

Crack Width at Break

1.5 mm

Crack Bridging Ability

5.0

Tensile adhesion strength

2.9 (2.8) N/mm²

(EN 1542)

Capillary absorption

w = 0.02 kg/(m²h0.5)

(EN 1062-3)

Permeability to water vapour

Dry Film Thicknessd = 210 µm
Equivalent Air Layer ThicknessSD = 1.0 m
Diffusion Resistance Coefficientµ = 2,944 

Permeability to carbon dioxide

Dry film thickness

d = 210 µm

CO2 Diffusion Coefficient

D = 3.7 x 10-07 cm2/sec

Diffusion Resistance Coefficientµ = 5.4 x 105
Equivalent air layer thicknessR = 112 m
Equivalent Thickness of Concrete Sc = 28 cm

Behaviour after artificial weathering

Pass after 2000 hours

(EN 1062-11)

Freeze thaw de-icing salt resistance

2.9 (2.1) N/mm²

(EN 13687 part 1 & part 2)

Application

Application Information

Layer thickness

Minimum required dry film thickness to achieve the required characteristics (CO2 equivalent air thickness of 50 m) ≈ 160 μm.
Minimum required dry film thickness to achieve full durability characteristics (CO2 diffusion, adhesion after thermal cycling and crack bridging) ≈ 340 μm.

Ambient air temperature

+8°C min. / +35°C max.

Relative air humidity

< 80%

Dew point

Temperature must be at least 3°C above dew point.

Substrate temperature

+8°C min. / +35°C max.

Waiting time to overcoating

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

Previous coating

Waiting time

Next coating

Sikagard®-552 W Aquaprimer

5 hours min.

Sikagard®-550 W Elastic

Sikagard®-550 W Elastic8 hours min.Sikagard®-550 W Elastic

Applied product ready for use

Full cure: ~ 7 days at +20°C
Consumption

Consumption

Product

Per coat

Sikagard®-552 W Aquaprimer~ 0.10 - 0.15 kg/m2

Sikagard®-550 W Elastic

~ 0.25 - 0.35 kg/m2
Application steps

APPLICATION

Apply Sikagard®-552 W AquaPrimer evenly onto the substrate.
Sikagard®-550 W Elastic can be applied by brush, roller or airless spray.
For more details, refer to Protective Coating Application Method Statement.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with clean water immediately after use.
Hardened / cured material can only be removed mechanically.
For Sikagard®-551 S Elastic Primer use Sika® Thinner C.

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