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🔧 Seal it once, seal it right — the pro’s choice for lasting bonds!
Sikaflex-221 is a professional-grade, black polyurethane sealant and adhesive offering a 10.1 fl oz cartridge for easy application. It bonds permanently to a wide range of surfaces including metal, plastics, and ceramics, cures fully in 3 hours, and resists aging, seawater, and chemicals. NSF-approved for safe use in drinking water and food production, it delivers a waterproof, elastic seal ideal for demanding industrial and household projects.















| ASIN | B00NW5LWHA |
| Best Sellers Rank | #942 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 (3,063) |
| 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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