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⚓ Seal the deal fast — marine strength that won’t let you down!
Sikaflex-291 is a professional-grade, fast-curing polyurethane adhesive and sealant designed for marine applications. It offers superior adhesion to multiple surfaces including fiberglass, metal, and wood, with excellent resistance to water, fuels, and chemicals. Ideal for above and below waterline use, it provides durable, vibration-resistant seals that are NSF and USDA approved, making it a trusted choice for boat builders and marine maintenance pros.















| ASIN | B01GPIXX5Y |
| Best Sellers Rank | #7,096 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #56 in Silicone Adhesives #57 in Adhesive Caulk #123 in Industrial Sealants |
| Brand Name | SIKA |
| Color | White |
| Compatible Material | Fiberglass, Metal, Wood |
| Container Type | Cartridge |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,343) |
| Included Components | 10.1 fl oz Cartridge |
| Item Form | Gel |
| Item Package Quantity | 1 |
| Item Type Name | Adhesive |
| Item Weight | 300 g |
| Manufacturer | Sika USA |
| Material Type | 1-C polyurethane |
| Model | 90919 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Fast Curing |
| Part Number | 90919 |
| Specific Uses For Product | Boating |
| Tensile Strength | 260 kips_per_square_inch |
| UPC | 033886005258 |
| Unit Count | 10.1 Fluid Ounces |
| Viscosity Level | Medium |
| Volume | 10.1 fluid ounces |
| Water Resistance Level | Water Resistant |
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