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Prepare suitable metal surfaces for dependable polyurethane adhesive bonding. Sika® Primer-210 is a solvent-based adhesion primer used as part of specified Sika bonding systems on prepared aluminium, steel and other compatible metals.
Key benefits
- Adhesion promotion: helps polyurethane adhesives bond to compatible metal substrates.
- Thin-coat application: simple pretreatment with a suitable applicator.
- Professional versatility: supports selected marine, fabrication and industrial bonding systems.
Application
Clean, dry and degrease the substrate, then apply one thin, complete coat. Check flash-off time, substrate suitability and adhesive compatibility in the current pretreatment chart.
Important to know
Use only as part of an approved Sika bonding system. Do not dilute or mix with other substances.
Promotes adhesion on selected metallic bonding substrates.
Supports specified industrial, fabrication and marine bonding assemblies.
Single thin primer coat before the compatible adhesive.
Clean and degrease dry bonding surfaces. Apply one thin covering coat with a brush, felt or clean lint-free applicator. Typical minimum flash-off is 10 minutes above 15°C, or 30 minutes below 15°C; check the adhesive pretreatment procedure for the actual bonding window. Reseal immediately after use.
Only use with Sika-approved substrate and adhesive combinations. Do not dilute. Avoid early stress or high temperatures on the bond line; the primer may remain thermoplastic for up to three days. Discard product if it separates, gels or significantly thickens.
- Prepared aluminium
- Prepared steel
- Compatible non-ferrous metals
Sika® Primer-210 Physical Properties
| Property | Value |
|---|---|
| Chemical base | Solvent-based epoxy solution |
| Colour | Colourless to slightly yellow |
| Solids | 34% |
| Application Temperature | +5°C to +40°C |
| Ideal application temperature | +15°C to +25°C |
| Indicative coverage | 50 mL/m² |
| Flash-off at ≥15°C | 10 min minimum |
| Flash-off below 15°C | 30 min minimum |
| Maximum flash-off | 24 h (system dependent) |
| Shelf Life | 9 months under specified unopened storage |