Sikaflex-221 multi-purpose Black polyurethane adhesive/sealant is suitable for application on metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics.
Please Note: Sikaflex-221 is suitable for professional users only. The user should seek manufacturer’s advice and perform tests on original substrates before using this product on materials prone to stress cracking.
The one-component sealant cures on exposure to atmospheric humidity and is suitable for making permanent elastic seals of high adhesive strength.
- Bonds well to a wide variety of substrates
- Resistant to ageing
- Can be painted
- Can be sanded
- Non-corrosive
- Low odour
- NSF-approved for incidental food contact
- Brand: Sikaflex
- Tube size: 300ml / 410g
- Colour: Black
- Chemical base: 1-component polyurethane
- Cure mechanism: Moisture-curing
- Density (uncured) depending on colour: 1.3 kg/l
- Non-sag properties: Good
- Application temperature ambient: 5 ─ 40 °C
- Skin time (CQP019-1): 60 minutes A
- Open time (CQP526-1): 45 minutes A
- Curing speed (CQP049-1): (see diagram)
- Shrinkage (CQP014-1): 5 %
- Shore A hardness (CQP023-1 / ISO 7619-1): 40
- Tensile strength (CQP036-1 / ISO 527): 1.8 MPa
- Elongation at break (CQP036-1 / ISO 527): 500 %
- Tear propagation resistance (CQP045-1 / ISO 34): 7 N/mm
- -50 ─ 90 °C
- 24 hours: 120 °C
- 1 hour: 140 °C
- A) 23 °C / 50 % r.h.
- B) storage below 25 °C