Sika Sikaflex-221 Multi-Purpose Sealant & Adhesive, 10.3oz Gray

Achieve durable and elastic bonds across a wide range of materials with Sika Sikaflex®-221, a high-quality multi-purpose polyurethane sealant and adhesive. This versatile, 1-component formulation cures on exposure to atmospheric humidity, forming a resilient elastomer that stands up to demanding conditions. Ideal for permanent elastic seals with high adhesive strength, Sikaflex®-221 is the professional's choice for reliable sealing and bonding. Upgrade your projects with Sika's trusted performance today.

• Versatile 1-Component Formula: Easily applied polyurethane sealant cures to form a durable elastomer on exposure to atmospheric humidity, providing strong and lasting adhesion.
• Exceptional Adhesion Range: Bonds effectively to a wide variety of substrates including wood, metals, metal primers, 2-component paint coatings, ceramic materials, and plastics.
• Highly Elastic and Durable: Offers permanent elastic seals with impressive 500% elongation at break, providing excellent flexibility and vibration dampening to resist cracking.
• Superior Weather Resistance: Engineered to be highly resistant to aging, weathering, and exposure to seawater, ensuring long-term performance in challenging environments.
• Non-Corrosive Composition: Its non-corrosive nature makes it safe for use on sensitive metal substrates without causing damage.
• Sandable and Overpaintable: Allows for seamless integration into finished surfaces, enabling sanding and painting once the sealant is tack-free.
• Certified for Potable Water & Safety: NSF registered and UL listed for potable water contact (NSF/ANSI/CAN 61 certified) and proprietary substances (for black, gray, and white colors), meeting stringent safety and performance standards. It also meets ASTM C920 and ANSI/UL 723 for surface burning characteristics.
• Low Odor Application: Features a low-odor formulation for improved comfort during application.
• Chemical Resistance: Generally resistant to fresh water, seawater, diluted acids, and caustic solutions, and temporarily resistant to fuels, mineral oils, vegetable, and animal fats and oils.

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.