Sika Sikaflex-221 Aluminum Gray Sealant & Adhesive
One-component polyurethane sealant/adhesive that bonds to metals and plastics and is sandable and paintable. Resists aging and seawater exposure; suitable for durable, elastic seals. Customers note good adhesion and leak-stopping capability, with some difficulty in extrusion and color accuracy concerns
Highlights
- one-component urethane
- aluminum gray color versatility
- resists aging and seawater
Pros
- bonds to metals and plastics
- sandable and paintable
- one-component and elastic seal
- age and seawater resistant
- easy to work with for many projects
Cons
- tough to get out of the tube
- color accuracy issues (not white as advertised)
- some reports of premature hardening
Best For
Features
- One-component urethane sealant for bonding to metals and plastics
- Formulated to resist aging and seawater, acids, and caustic solutions
- Ready-to-use cartridge compatible with standard pneumatic tools
