Sika Sikaflex 221 Multi-Purpose Polyurethane Sealant and Adhesive - 10.3 oz Cartridge - White

Sikaflex 221 Multi-Purpose Polyurethane Sealant/Adhesive - 10.3oz (300ml) Cartridge - White

Sikaflex-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer. Meets approvals ASTM C920 types Sikaflex-221 is tested and classified by ANSI/UL 723 Test for Surface Burning Characteristics of Building Materials.

Uses:

Sikaflex-221 bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are wood, metals, metal primers and paint coatings (2-c systems), ceramic materials, and plastics.

Features:

• Highly elastic and durable
• Resistant to aging and weathering exposure
• Non-corrosive
• Can be sanded and overpainted
• NSF-registered, Proprietary Substances and Nonfood Compounds (black, grey, and white)
• UL listed for potable water (black, grey, and white)

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

The Sika Sikaflex 221 is a versatile, high-performance polyurethane sealant and adhesive designed for a wide range of construction and repair applications. This 10.3-ounce cartridge provides a reliable, durable bond on various substrates including wood, metals, ceramics, plastics, and painted surfaces. Its high elasticity ensures that it maintains a strong seal even under movement or expansion, making it ideal for sealing joints and bonding materials in both interior and exterior environments. Sikaflex 221 cures upon exposure to atmospheric humidity, forming a flexible elastomer that resists aging, weathering, and UV exposure, ensuring long-lasting performance. The product is non-corrosive and can be sanded and overpainted, allowing for seamless integration into finished surfaces. It has been tested and approved according to ASTM C920 standards and is UL listed for potable water, making it suitable for plumbing and water-related projects. Additionally, Sikaflex 221 meets NSF registration requirements and is available in white, black, and gray colors, providing versatility for different aesthetic and functional needs. Whether used for sealing, bonding, or waterproofing, Sikaflex 221 delivers high adhesive strength and durability for professional and DIY projects alike. This product is compliant with safety standards and is formulated with proprietary, non-food contact substances, emphasizing its suitability for a range of demanding applications. Proper application ensures a weather-resistant, elastic seal that provides long-term integrity and performance in a variety of challenging environments.

Features:

• Highly elastic and durable for long-lasting seals

• Resistant to aging, weathering, and UV exposure

• Non-corrosive formulation suitable for multiple substrates

• Can be sanded and overpainted for seamless finish

• UL listed for potable water applications and NSF registered

• Available in white, black, and gray colors for versatile use