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🔧 Seal it once, seal it right — the pro’s choice for permanent bonds!
Sikaflex-221 is a premium black polyurethane sealant and adhesive designed for permanent elastic seals on diverse surfaces including metal, plastic, and ceramics. It cures fully in 3 hours, is waterproof, non-corrosive, and NSF-approved for use in drinking water and food environments, making it the go-to solution for professionals demanding durability, safety, and versatility.










| ASIN | B00NW5LWHA |
| Best Sellers Rank | #995 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Polyurethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 2,978 Reviews |
| 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 |
| Part Number | 90893 |
| Surface Recommendation | Metal, Wood, Glass |
| Unit Count | 10.1 Fluid Ounces |
| Water Resistance Level | Waterproof |
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