Thinner C 25/90 S is the thinner used in AkzoNobel Aerospace Coatings' Aerodur Finish C 21/100 polyurethane topcoat system. Aerodur Finish C 21/100 is an isocyanate cured universal polyurethane high gloss finish for structural use, with excellent gloss retention and resistance to staining and to aircraft hydraulic fluids and chemicals. Thinner C 25/90 S is used under normal conditions; Thinner 98064 or 96184 is preferred in warm conditions.
Use in the System (spray application)
- Mix by volume: 4 parts Aerodur Finish C 21/100, 4 parts Hardener S 66/22 R, 2–3 parts thinner; by weight 100 : 69 : 30–49
- Add the hardener first and stir, then add Thinner C 25/90 S and stir until homogeneous; no induction time
- Initial spraying viscosity (23 °C) 36–42 seconds ISO cup 3; pot life (23 °C) 8 hours
- Dry film thickness 20–30 µm; application at 15–35 °C, relative humidity 35–75%
Values and Storage
- Thinner C 25/90 S flash point below 21 °C
- 36 months at 5–35 °C, dry, in the original unopened containers
| Packing | 1 LT or 5 LT |