PPG 4123 is a two-component chromated epoxy primer for aircraft exterior structures. It is anti-corrosive and flexible, resists ester oils, grease, kerosene and hydraulic fluids, and withstands temperatures up to 130 °C (266 °F).
Specifications
- Qualified to DHS 186-111; meets the technical requirements of MIL-P-23377
- Compatible topcoat specifications: AIMS 04-04-003, AIMS 04-04-012, ASNA 4247, BLGG 140301, ECS 2139-20, ECS-L-12261, NORMDEF 0003-1
Mixing and Application
- Mix ratio by volume: 4123 base 1 part : 0628/9001 activator 1 part; 0469/9000 thinner to viscosity
- No induction time; pot life 8 hours at 21–25 °C
- Apply at 15–30 °C and 30–80% RH in one cross coat to 20–25 µm (0.8–1 mil) dry film
- Theoretical coverage: 12 m²/L at 25 µm; matt finish (<5 GU at 60°)
Drying Times (23 °C, 50% RH)
- Dry to touch 15–30 minutes; dry to handle 1–1.5 hours; dry to tape 2–3 hours
- Overcoat after 4 hours minimum, 72 hours maximum
- Full cure: 7 days at 23 °C, 1 hour at 80 °C or 15 minutes at 120 °C
Storage
- Base and activator: 24 months in original unopened containers; store at 5–35 °C
- Colours: green-blue-grey (4123/5045), yellow-green (4123/3600)
| Color | Yellow/Green or Blue/Gray |
| Packing | 5 LT |