Sikaflex 1A Polyurethane Sealant Sausage, 20 oz. – White

Sikaflex 1A is a professional-grade, one-component, moisture-curing polyurethane sealant designed for a wide variety of sealing and bonding applications. Its non-sag, non-slump formulation makes it ideal for vertical and overhead joints, delivering reliable performance in both interior and exterior environments. Whether you’re working on expansion joints in concrete, metal framing connections, or sealing gaps around windows and doors, Sikaflex 1A provides durable, flexible adhesion that stands up to weather, UV exposure, and routine movement.

Formulated for contractors and tradespeople, this 20 oz. sausage pack dispenses easily with a standard caulking gun and ensures minimal waste. Once cured, the sealant can be painted or sanded to match surrounding finishes, offering a seamless, professional look on any project.

Key Features

• One-component, moisture-cure polyurethane technology
• Non-sag formula for vertical and overhead applications
• Excellent adhesion to concrete, masonry, metals, wood, and most plastics
• Durable flexibility over a wide temperature range (–40 °F to 176 °F)
• Paintable and sandable after cure
• Weather* and UV-resistant for long-term performance