Sika Sikaflex-221 White Multi-Purpose Sealant/Adhesive
One-component polyurethane sealant/adhesive for various substrates. Sets quickly, cures to a flexible seal, and is sandable/paintable. Customers note good adhesion and ease of application, with some mixed opinions on drying time and color accuracy
Highlights
- one-component polyurethane
- versatile substrate adhesion
- sandable/paintable with aging resistance
Pros
- bonds to metals and plastics
- one-component for easy use
- sandable and paintable
- resists aging and seawater
- easy application
Cons
- mixed opinions on drying time
- color may not match white as advertised
- some reports of sealant failing during first use
Best For
Features
- One-component urethane sealant bonds to metals, plastics, and primers/coatings
- Formulated for aging resistance and stability in diverse conditions
- Resistant to seawater, diluted acids, and caustic solutions
- Ready-to-use cartridge compatible with manual, pneumatic, or electric guns
