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
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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)
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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 protection | SD, CO2 ≥ 50 m |
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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 Primer | 18 hours min. | Sikagard-550 W Elastic | | Sikagard-550 W Elastic | 8 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 |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.
