Sikaflex-221 sealant
- Multifunctional adhesive sealant
- Resistant to ageing
- Paintable
Sikaflex-221 is a 1-component polyurethane adhesive and sealant for a wide range of applications. The elastic sealant adheres well to a wide variety of substrates, including metals, metal primers, painted surfaces, ceramic materials and various plastics.
Sikaflex-221 sealant is suitable for creating durable, elastic seals and for bonding different materials. Thanks to its good ageing resistance, the sealant is suitable for applications where a long-lasting elastic bond or seal is required.
The sealant cures by reaction with atmospheric moisture and has good non-sag properties. Sikaflex-221 can also be sanded and overpainted, making it suitable for applications where the finish after sealing or bonding is important.
Features of Sikaflex-221
- Multifunctional adhesive and sealant.
- Adheres well to a wide variety of substrates.
- Suitable for permanent, elastic seals.
- Good ageing resistance.
- Can be sanded and painted over.
- Non-corrosive.
- Low odour.
- Complies with EN 45545-2 R1/R7 HL3.
Applications
Sikaflex-221 can be used for sealing and bonding various materials. The product is suitable for use on:
- Metals.
- Aluminium.
- Metal primers.
- Painted surfaces and two-component coatings.
- Ceramic materials.
- Various plastics.
This adhesive and sealant is suitable for both industrial applications and general assembly, sealing and repair work where an elastic bond or seal is required.
Application
We recommend applying Sikaflex-221 to a clean and dry surface, free from grease, oil and dust. Surface preparation depends on the substrate and is crucial for long-lasting adhesion. Sikaflex-221 can be applied at temperatures between 5°C and 40°C. Please note that temperature affects the product’s reactivity and application properties. The optimum temperature for both the substrate and sealant is between 15°C and 25°C. Sikaflex-221 can be applied using a manual, pneumatic or electric piston gun, or pump equipment.
Specifications
Contents: 300 ml cartridge
Chemical basis: 1-component polyurethane
Colour: white, grey, black and beige
Curing mechanism: moisture curing
Density (uncured): 1.3 kg/l
Non-sag properties: good
Ambient application temperature: 5–40 °C
Skin formation time: 60 minutes (23 °C / 50 % RH)
Open time: 45 minutes (23 °C / 50 % RH)
Shrinkage: 5 %
Hardness (Shore A): 40
Tensile strength: 1.8 MPa
Elongation at break: 500 %
Tear resistance: 7 N/mm
Shelf life: 12 months (stored below 25 °C)
Suitable application gun: cartridge gun
We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.
Safety equipment
Gevaar
| Code | Description |
|---|---|
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| P260 | Do not breathe dust/fume/gas/mist/vapours/spray. |
| P284 | [In case of inadequate ventilation] wear respiratory protection. |
| P304+P340 | IF INHALED: Remove person to fresh air and keep comfortable for breathing. |
| P342+P311 | If experiencing respiratory symptoms: Call a POISON CENTER/doctor/… |
| P501 | Dispose of contents/container in accordance with in accordance with local regulation |
| EUH205 | Contains epoxy constituents. May produce an allergic reaction. |
| MDI | As from 24 August 2023 adequate training is required before industrial or professional use |
