Sika Sikaflex 221 Non-sag Polyurethane Sealant Gray is a one component, moisture-curing polyurethane adhesive sealant that is used for creating a permanent elastic seal for substrates such as metals, wood, paint coatings, ceramics, and plastics. It is a non-corrosive, low odor, high quality sealant that is resistant to diluted acids, limewater, seawater, freshwater, weathering, and aging. 600 mL Sausage.
| Typical Use: | Sikaflex-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. | 
| Brand: | Sikaflex | 
| Chemical Composition: | Polyurethane | 
| Color: | Gray | 
| Components: | 1 part | 
| Elongation: | 500% @ break | 
| Hardness: | 40 A | 
| Service Temperature: | -40 to 90 °C | 
| Tack Free Time: | 60min | 
| Tensile Strength: | 260 psi |