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🔧 Seal it once, seal it right — the pro’s choice for lasting bonds!
Sika Sikaflex-221 is a professional-grade, multi-purpose polyurethane sealant and adhesive in a convenient 10.1 fl oz cartridge. It creates permanent elastic seals that bond to metals, plastics, ceramics, and more. This waterproof, age-resistant, and NSF-approved formula cures quickly, is sandable and paintable, making it ideal for durable internal and external sealing applications.










| ASIN | B0CRS12FHB |
| Best Sellers Rank | #961 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Polyurethane Adhesives #14 in Urethane Adhesives |
| Brand Name | SIKA |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,951) |
| Global Trade Identification Number | 10033886005095 |
| Included Components | Sealant |
| Item Form | Oz |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | SIKA |
| Material Type | Polyurethane |
| Model | 90891 |
| Number of Items | 24 |
| Part Number | 90891 |
| Surface Recommendation | Metal, Wood, Glass |
| Unit Count | 242.4 Fluid Ounces |
| Water Resistance Level | Waterproof |
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