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

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

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 in accordance with 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.

Characteristics Advantages:

• 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, gray, and white)
• UL listed for potable water (black, gray, 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 applications. This 10.3 oz (300 ml) cartridge features a black formulation engineered for durable, elastic bonds and sealing solutions. It cures on exposure to atmospheric humidity, forming a flexible elastomer that resists aging and weathering, making it suitable for both indoor and outdoor use. Its high elasticity allows it to accommodate movement and expansion in different substrates, ensuring long-lasting seals and bonds. The Sikaflex 221 adheres strongly to various materials including wood, metals, coated surfaces like paint and primer, ceramics, and plastics, making it a reliable choice for construction, repair, and maintenance tasks. Additionally, it is non-corrosive and can be sanded or overpainted, providing flexibility in finishing and aesthetic customization. Certified under ASTM C920 standards and classified according to ANSI/UL 723 for surface burning characteristics, it meets strict safety and performance benchmarks. The product is also NSF registered and UL listed for potable water applications, making it suitable for plumbing, water features, and food-safe environments. The black color variant is ideal for applications requiring concealment or specific aesthetic considerations. Please note that this product contains chemicals known to the State of California to cause reproductive harm, and proper safety precautions should be followed during use. Overall, Sikaflex 221 offers a reliable, elastic, and versatile sealing and bonding solution suitable for a wide array of industrial and DIY projects, ensuring durable results with ease of application.

Features:

• Highly elastic and durable for long-lasting performance

• Resistant to aging and weathering exposure for outdoor durability

• Non-corrosive composition suitable for various substrates

• Can be sanded and overpainted for finishing flexibility

• Certified for use with potable water and meets safety standards