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Sikagard-550 W Elastic, Crack-Bridging Concrete Coating, Exterior, 15 L

Sikagard-550 W Elastic, Crack-Bridging Concrete Coating, Exterior, 15 L

Surface Treatments
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 15 L
Usage Elastic protective coating for concrete at risk of cracking (outdoor)
Chemical Base Acrylate dispersion
Usage Area Exterior
Color Thixotropic liquid available in almost every RAL colour shade.
Storage Conditions Store in cool and dry conditions. Protect from direct sunlight and frost
Density 1.39 kg / L (at +20°C)
Consumption 0.10 - 0.15 kg / m²

Crack bridging 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
  • The system is resistant to aggressive atmospheric influences
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
  • The system is resistant to aggressive atmospheric influences
     
Packaging

15 l oval plastic pail
Colour

Thixotropic liquid available in almost every RAL colour shade.
Technical Information
Tensile Adhesion Strength

2,9 (2,8) N/mm²

(EN 1542)

Crack Bridging Ability

Class A1 (-20°C) - 2 coats

(EN 1062-7)

Class B2 (-15°C) - 3 coats

Freeze Thaw De-Icing Salt Resistance

2,9 (2,1) N/mm²

(EN 13687 part 1 & part 2)

Behaviour after Artificial Weathering

Pass after 2000 hours

(EN 1062-11)

Permeability to Water Vapour

Dry film thickness

d = 230 µm

Equivalent air layer thickness

SD, H2O = 0.35 m

Diffusion coefficient H2O

µH2O = 1,5 x 103

Requirements for breathability≤ 5 m

Capillary Absorption

w = 0,02 kg/(m²h0.5)

(EN 1062-3)

Permeability to CO2

Dry film thickness

d = 160 µm

Equivalent air layer thickness

SD, CO2 = 51 m

Diffusion coefficient CO2

µCO2 = 3,1 x 105

Requirements for protectionSD, CO2 ≥ 50 m
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 / 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-551 S Elastic Primer18 hours min.Sikagard-550 W Elastic
Sikagard-550 W Elastic8 hours min.Sikagard-550 W Elastic
Curing Treatment

Sikagard-550 W Elastic does not require any special curing but must be protected from rain for at least 4 hours at +20°C.
Applied Product Ready for Use

Full cure: ~ 7 days at +20°C