PPG Desoprime CA7049 Yellow Chrome Free Primer

PPG Desoprime™ CA7049 is a three-component, chromate-free, high-solids epoxy primer designed to protect exterior aircraft surfaces, and is also suitable as a refresh primer over basic primers. Corrosion inhibiting and low in VOC, it offers excellent adhesion and fluid resistance and is compatible with polyurethane and epoxy topcoats, with a service temperature of −55 °C to 177 °C (−65 °F to 350 °F).

Specifications (manufactured in Europe)

• AIMS 04-04-031, -032, -033, -034, -036, -037; AMS 3095; AWMS 28-001 Type I Grade B; DGQT 1.7.0.0121
• Compatible topcoat specifications: AIMS 04-04-012/-013/-025/-032, BAMS 565-009, BMS 10-60 Type I and II, DMS 2115, MIL-PRF-85285 and others

Mixing and Application

• Mix ratio by volume: 7049 base 3.5 : 7049B1 activator 1 : 7049CX thinner 1
• No induction time; pot life 2 hours at 21–25 °C
• Over composites, aluminium prepared with DesoGel™ EAP-9/EAP-12 or MIL-DTL-5541 conversion coating, or chromic acid anodised aluminium
• Apply at 20–35 °C and 20–80% RH in one medium coat to 20–30 µm (0.8–1.2 mil); theoretical coverage 24 m²/L at 25 µm

Drying Times (22–28 °C, 50% RH)

• Dust free 1.5–2 hours; dry to handle 2–3 hours; dry to tape 5–6 hours; dry to sand 6 hours
• Overcoat with CA8000 and CA8800 4–72 hours; full cure 7 days (24 hours at 60 °C)

Storage

• Base and activator 12 months, thinner 24 months (unopened containers); 5–35 °C
• Mixed VOC <350 g/L; colours yellow (7049E03125) and cream (7049E01300)