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🔧 Seal smart, last long—because your projects deserve the best!
SIKA Sikaflex 1a is a premium one-component polyurethane sealant designed for durable, flexible, and weather-resistant sealing of concrete and masonry joints. It offers easy application with standard tools, strong adhesion without primer, and accommodates joint movement up to ±35%, making it ideal for both vertical and horizontal construction joints.










| ASIN | B00MH8ND16 |
| Best Sellers Rank | #57,606 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #28 in Polyurethane Adhesives #111 in Urethane Adhesives |
| Brand | SIKA |
| Brand Name | SIKA |
| Color | WHITE |
| Customer Reviews | 4.1 out of 5 stars 54 Reviews |
| Full Cure Time | 24 hours |
| Initial Hardening Time | 6 hours |
| Item Form | Liquid |
| Item Weight | 1.9 pounds |
| Liquid Volume | 20 fluid ounces |
| Manufacturer | SIKA |
| Material Type | Polyurethane |
| Maximum Gap Fill | 0.5 inches |
| Model | SIKA-91008 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 91008 |
| Surface Recommendation | joints, fillets, windows, door frames, reglets, flashing |
| Temperature Range | 4E+1 °F |
| UPC | 033886002981 |
| Unit Count | 20 Fluid Ounces |
| Water Resistance Level | Waterproof |
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