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Water based acrylic copolymer protective and decorative coating for concrete and masonry.


Water based Elastomeric Decorative Coating.



Crack bridging protective coating for conrete.

Product Description:

Sikagard®-550 W Elastic is a one part, plasto-elastic coating based of UV-curing acrylic dispersion with excellent crack-bridging properties even at temperatures below 0°C.


  • Protection and enhancement of concrete structures (normal and lightweight concrete), especially exposed concrete surfaces with a risk of cracking
  • With concrete repair works as an elastic protective top coating on Sika® mortar thin layer levelling mortar (refer to product data sheet)

Characteristics / 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
  • Can be diluted with water
  • Environmentally friendly (solvent free)
  • Reduced tendency to dirt pick up and contamination

Product Data:


Appearance / Colours
Thixotropic liquid available in almost every colour shade.

Packaging 15 litre pails


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 Acrylate dispersion
Density ~ 1.39 kg/l (at +20°C)
Solid Volume ~ 53.4%
Solid Content ~ 66.1%
Layer Thickness dminp (minimum required thickness to achieve the required characteristics - CO2 equivalent air thickness of 50 m and crack bridging) = 200 microns. Dmaxp (maximum required,

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 = 337 μm
Equivalent air layer thickness SD, Co2 = 0.84 m
Diffusion coefficient μCO2 = 2.5 x 105
Requirements for breathability 50 m

Water Vapour Diffusion Coefficient (μH2O)
Dry film thickness d = 319 μm
Equivalent air layer thickness SD, H2O = 0.78 m
Diffusion coefficient H2O μH2O = 2.5 x 103
Requirements for breathability _ 4 m

Mechanical / Physical Properties:

Elongation at Tear Elongation at break at room temperature (not exposed to weathering): 63%
Elongation at break at -20°C: 32%
Crack-Bridging Capacity Class IT according to ZTV SIB 90-TL/TP OS

System Information:

System Product(1) Number of
Priming (2) Sikagard®-552 W Aquaprimer  1
Top coat Sikagard®-550 W Elastic 2
Priming (2) Sikagard®-552 W Aquaprimer 1
Intermediate coat (3) Sikagard®-545 W Elastofill or Sikagard®-526 Porefiller 1-2
Top coat (4) Sikagard®-550 W Elastic 2

Sikagard 550W Elastic / Anti-carbonation coatings
Concrete Renovations - Concrete Repair Specialists

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