Sika Sikaflex 221 General Purpose Adhesive And Sealant
Sika Sikaflex 221 General Purpose Adhesive And Sealant
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SKU:SA-221-BLK
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SIKAFLEX 221 is a fast curing, polyurethane based, flexible sealant for manufacturing and repair. Sikaflex®-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals .
Suitable substrate materials are metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics.
It is ideally used for internal sealing and simple bonding applications.
Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex®-221 on materials prone to stress cracking.
This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.
- Bonds well to a wide variety of substrate
- Resistant to ageing
- Can be sanded and painted
- Passes EN45545-2 R1/R7 HL3
- Non-corrosive
- Low odour
| Chemical base |
1-component polyurethane |
| Colour (CQP001-1) |
White, grey, black, brown |
| Cure mechanism |
Moisture-curing |
| Density (uncured) |
1.3 kg/l |
| Non-sag properties |
Good |
| Application temperature |
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 48-4) |
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 |
| Service temperature (CQP513-1) |
-50 ─ 90 °C 120 °C 140 °C |
| Shelf life |
12 months |
