High-performance joint sealant for concrete, masonry and EIFS facades SikaHyflex-250 Facade is a 1-part polyurethane joint sealant. It is used for durably sealing movement and connection joints in concrete, masonry and EIFS facades. - Easy to extrude and tool.
- Very high movement capability of +100 % / -50 % (ASTM C 719).
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Usage The Product is used for sealing and weatherproofing joints in the building envelope where reliability and durability is required. The Product is used for the following application areas: - Interior or exterior joint sealing.
- Around window and door frames.
- Around facade elements.
- Around precast elements.
- EIFS facades.
Advantages - Easy to extrude and tool.
- Very high movement capability of +100 % / -50 % (ASTM C 719).
- Monomeric diisocyanate content <0.1 %: no user safety training needed (REACH restriction 2023, Annex XVII entry 74).
- Odourless.
- Very low emissions.
- Good adhesion to many construction materials.
- Good resistance to weathering.
Packaging 300 ml cartridges | 12 cartridges per box | 600 ml cylindrical foil pack | 20 foil packs per box |
Refer to the current price list for available packaging variations. Colour Available in a range of colours, refer to the price list for further information. |
Technical Information Shore A Hardness Cured 28 days at +23 °C and 50 % R.H. | 20 |
Secant Tensile Modulus Cured 28 days at +23 °C and 50% R.H. Measured at 100% elongation at +23 °C | 0.30 N/mm2 | Cured 28 days at +23 °C and 50% R.H. Measured at 100% elongation at -20 °C | 0.60 N/mm2 |
Elastic Recovery Cured 28 days at +23 °C and 50 % R.H. Measured at 100 % elongation for 24 hours | 80 % |
Tear Propagation Resistance Cured 7 days at +23 °C and 50 % R.H. | 5.0 N/mm |
Movement Capability +100 % / -50 % | (ASTM C719) |
Service Temperature Maximum | +70 °C | Minimum | -40 °C |
Joint Design For movement joints, the width must be at least 8 mm and should not exceed 40 mm. For non-movement joints such as connection joints in interior areas, the joint width can be less than 8 mm. The joint dimensions must be designed to suit the movement capability of the sealant. In all cases joints must be at least 8 mm deep or a have a width to depth ratio of 2 : 1 whichever is greater. For more information about joint design and calculations refer to the Sika document Design guideline: Dimensioning of construction joints or contact Sika Technical Services.
Elongation at break Cured 7 days at +23 °C and 50 % R.H. Measured at 100 % elongation at -20 °C | 800 % |
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Application Information Backing Material Use closed cell, polyethylene foam backing rod. Sag Flow 20 mm profile tested at +50 °C | 0 mm |
Product Temperature Maximum | +40 °C | Minimum | +5 °C |
Ambient Air Temperature Maximum | +40 °C | Minimum | +5 °C |
Substrate Temperature Maximum | +40 °C | Minimum | +5 °C |
Beware of condensation. Substrate temperature during application must be at least +3 °C above dew point. Curing Rate At +23 °C and 50 % R.H. | 3 mm / 24 h |
Skin Time At +23 °C and 50 % R.H. | 70 minutes |
Tooling Time At +23 °C and 50 % R.H. | 65 minutes |
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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.
