Sikaflex 221
Multipurpose PU sealant for long term durability
| Applications |
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| Replaces |   |
| Available pack size | 300ml, 600ml, 23Litre |
| Standards | NSF approved,ASTM C920, TT-S-00230C/REACH/RoHS |
| Related Accessories (Click image to explore more) |    |
Specifications
| Chemical Composition | Polyurethane |
| Curing Mechanism | Moisture |
| Color | White/Grey/Black/Brown |
| Specific Gravity | N/A |
| Recommended substrates | Metals, Plastics, Composites, Ceramic. |
| Max gap fill | 6mm |
| Tack Free Time | 60min |
| Elongation at Break | 500% approx. |
| Hardness | 40 Shore A |
| Tensile Strength | 1.8MPa |
| Service Temperature | -40°C to 90°C |
Features and Benefits
| Very elastic and strong | |
| NSF approved for incidental food contact | |
| Bonds well to a variety of applications |
Notes
- Exhibits superior performance in transformer oil application
- Curing speed can vary depending on moisture and humidity presence
- Sealant inside an enclosed chamber can have delayed curing. Humidity chamber can be used to speedup.
Applications
Sikaflex 221 is for sealing applications in automotive, transportation, Wind, Solar industry.
This application is successfully executed for sealing of a cable joint in an electric motor of a giant industrial fan. In many end use these fans are used in outdoor areas or in locations where rain water can come into contact through roof holes. It was found that water would generally find its way through the cable groove and seep inside the motor windings causing malfunction. The problem is resolved by a slight modification in design and using Sikaflex 221 Polyurethane sealant.
Sikaflex 221 : Sealing & finishing of weld joints on diamond cut walkways prior to painting process.
This is a video of Sikaflex 221 in sachet packing. It is used for sealing and finishing of weld joints on diamond cut walkways prior to painting process. These walkways are manufactured in two parts and then joined by welding process. Welding leaves poor finish and uneven gaps even micro porosity that can lead to water seepage. Sikaflex 221 eliminates these problems by filling the pores, providing uniform finish and is paint-able post application. The final product is reliably leak proof and aesthetically appealing and long lasting
Sikaflex 221: Non sag Polyurethane Sealant for demanding Industrial and Automotive applications
Sikaflex 221 is used in
- Sealing in bus body, railways, trucks, refrigeration equipment
- As seam sealant in machine tools and construction equipment
- Bonding and sealing in GRP fabricated structures and many more
