Sika 90892 Sikaflex 221 Multi-Purpose Elastic Sealant Aluminum Gray 10.3 oz

Sika Sikaflex 221 is a high-performance, one-component polyurethane sealant designed for marine, automotive, RV, and industrial applications. This permanently elastic adhesive sealant accommodates movement between materials with dissimilar coefficients of thermal expansion, making it ideal for bonding dissimilar substrates.

Key Features:

• Permanently elastic joint movement capability maintains seal integrity through temperature changes and vibration
• Excellent adhesion to metals, plastics, painted surfaces, and wood without primers
• Superior UV and weathering resistance for long-lasting durability
• Rapid curing formula—odorless and non-staining
• Waterproof seal ideal for joints, seams, doors, windows, and panel bonding
• Paintable after curing for seamless finish
• Resistant to saltwater, diluted acids, and alkaline solutions

Sikaflex 221 is widely used in marine deck hardware installation, RV body panel bonding, automotive window sealing, and general construction applications where a flexible, durable, weather-resistant seal is required. The 10.3 oz cartridge is compatible with standard caulking guns for easy application.