Sikaflex 221 Multi-Purpose Adhesive and Sealant Pail Overview
Sikaflex 221 is a versatile, one-component polyurethane adhesive and sealant designed to provide durable, permanent elastic seals across a variety of substrates, including metals, ceramics, and plastics. This moisture-curing sealant offers strong adhesion without the need for priming, making it ideal for general bonding and internal sealing applications. Available in a 4.5-gallon pail, it?s perfect for smaller-scale projects or maintenance work where efficient coverage is needed. Certified under NSF/ANSI/CAN 61 for drinking water system components and NSF Proprietary Substances and Nonfood Compounds, Sikaflex 221 ensures dependable performance for sensitive environments. Its low-odor, non-corrosive formulation makes it safe to use in confined spaces.
Sikaflex 221 Features and Benefits
- Versatile Adhesion: Bonds effectively to metals, ceramics, plastics, and paint coatings.
- Certified for Drinking Water Systems: NSF/ANSI/CAN 61 listed.
- NSF Listed for Nonfood Compounds: Suitable for sensitive applications.
- Non-Corrosive and Low Odor: Safe to use in confined spaces or enclosed environments.
- Aging-Resistant: Maintains durability over time, even in demanding conditions.
- Paintable and Sandable: Allows for a smooth, professional finish.
Specifications
- Series: Sikaflex 221
- Chemistry: One-Component Polyurethane
- Application: General Sealing and Bonding
- Substrates: Metals, Metal Primers and Paint Coatings (2-Component Systems), Ceramic Materials, and Plastics
- Color: White and Black
- Cure Mechanism: Moisture-Curing
- Package Size: 4.5 Gallon Pail
- Density (Uncured): 10.8 lb/gal (1.3 kg/l)
- Application Temperature: 41?F to 104?F (5?C to 40?C)
- Skin Time: 60 Minutes
- Open Time: 45 Minutes
- Curing Speed: See Diagram on TDS
- Shrinkage: 5%
- Shore A Hardness: 40
- Tensile Strength: 260 psi (1.8 MPa)
- Elongation at Break: 500%
- Tear Propagation Resistance: 40 pli (7 N/mm)
- Service Temperature: -58?F to 194?F (-50?C to 90?C)
- 24 Hours: 248?F (120C)
- 1 Hour: 284?F (140C)
- Shelf Life: 6 Months
- Storage Temperature: Below 77?F (25?C) - Protect from Direct Sun Light
Other Package Sizes Available
WASHING INSTRUCTIONS:
Machine wash separately in cold water on a gentle cycle. Tumble dry separately on low heat. Add QE Home Wool Dryer Balls to reduce wrinkles and increases drying efficiency. Touch up with a low heat iron as needed. Do not bleach or dry clean.
