PPG 513X390/910X624 (2-USG-Kit) [EU]

DeSoto® 513X390 Military Epoxy Primer

Overview

DeSoto® 513X390 Military Epoxy Primer is a conventional solids, two-component epoxy primer designed for aerospace aluminum and composite substrates prior to topcoat application. It provides excellent adhesion, corrosion protection, and fluid resistance while maintaining performance across a wide operating temperature range. The primer is qualified to military aerospace specifications and is compatible with high-performance polyurethane topcoat systems.

Key Technical Characteristics

• Product Type: Two-component epoxy aerospace primer
• Base Component: 513X390
• Activator Component: 910X624
• Mix Ratio (by volume): 1:1
• Color: Yellow
• Service Temperature Range: -54°C to +177°C (-65°F to +350°F)
• Recommended Dry Film Thickness: 15-23 microns (0.6-0.9 mils)
• Pot Life: 8 hours at 21-25°C (70-77°F)
• VOC (mixed, ready for use): 650 g/L
• Dry Film Density: 1.76 g/cm� (14.66 lb/gal)
• Theoretical Coverage: 9 m�/L at 25 microns DFT

Core Performance Benefits

• Excellent corrosion resistance for aerospace structures
• Strong adhesion to aluminum and composite substrates
• Excellent resistance to aviation fluids and environmental exposure
• Compatible with Desothane® HS polyurethane topcoats
• Supports long-term durability in demanding military and commercial aerospace environments
• Wide operating temperature capability for extreme service conditions

Typical Applications

• Military aircraft exterior structures
• Commercial aircraft aluminum components
• Composite aerospace structures
• Aircraft assemblies requiring corrosion protection before topcoating
• Airframe maintenance, repair, and overhaul (MRO) applications
• OEM aerospace manufacturing and finishing operations

Material Engineering & Design Features

DeSoto® 513X390 is engineered as a high-performance epoxy primer system that combines corrosion protection with strong substrate adhesion. The formulation is designed for compatibility with aerospace polyurethane topcoats while maintaining resistance to aviation fluids and harsh operational environments.

The product is qualified to multiple aerospace and military specifications including:

• MIL-P-23377F Type I Class 1
• FMC 7715-01
• FMS-3027A

It is also compatible with topcoat systems meeting:

• DMS 2115
• MMS 420
• MIL-PRF-85285

Installation & Handling

• Thoroughly shake the base component before mixing
• Mix base and activator at a 1:1 volume ratio
• Maintain agitation for approximately 10 minutes during mixing
• Induction time required:
  • 40 minutes at 13-21°C (55-70°F)
  • 30 minutes at 22-28°C (71-84°F)
  • 10 minutes above 29°C (85°F)
• Recommended application temperature: 15-30°C (59-86°F)
• Recommended relative humidity: 20-90%
• Apply using conventional or HVLP spray equipment
• Recommended dry film thickness: 15-23 microns in a single coat with 50% overlap
• Surface preparation should include approved aluminum conversion coating treatment conforming to MIL-C-5541 or equivalent

Environmental & Compliance Notes

• Qualified to military aerospace primer specifications
• Read and follow applicable Safety Data Sheet (SDS) requirements before use
• For industrial use only
• Store in original unopened containers between 5°C and 35°C (41°F and 95°F)
• Shelf Life:
  • 12 months for most OEM specifications
  • 24 months under PRC-DeSoto standard requirements

Key Advantages for Aerospace Use

• Military-qualified corrosion protection system
• Excellent adhesion on both aluminum and composite substrates
• Outstanding resistance to aviation fluids and chemicals
• Compatible with leading aerospace polyurethane topcoat systems
• Supports long service life under severe operating conditions
• Wide service temperature capability from arctic to high-temperature environments
• Suitable for both OEM production and aircraft maintenance applications