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🔧 Seal it once, seal it right — the pro’s choice for lasting bonds!
Sikaflex-221 is a versatile, black polyurethane sealant and adhesive delivering permanent elastic seals with a fast 3-hour cure time. Its NSF-approved, non-corrosive formula bonds to metals, plastics, ceramics, and more, resisting aging and harsh elements including seawater. Packaged in a convenient 10.1 fl oz cartridge, it’s designed for precise application, sanding, and painting, making it the go-to solution for professional-grade sealing and bonding.















| ASIN | B00NW5LWHA |
| Best Sellers Rank | #1,121 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Polyurethane Adhesives |
| Brand Name | SIKA |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,066) |
| Full Cure Time | 3 hours |
| Included Components | Sealant |
| Item Form | Paste |
| Item Type Name | Sealant |
| Item Weight | 10.1 ounces |
| Liquid Volume | 10.1 fluid ounces |
| Manufacturer | SIKA |
| Material Type | Polyurethane |
| Model | SIKA-90893 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 90893 |
| Surface Recommendation | Metal, Wood, Glass |
| Unit Count | 10.1 Fluid Ounces |
| Water Resistance Level | Waterproof |
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