PPG Deft 99-GY-013 MIL-PRF-85285E Type IV Gray Topcoat – Gallon Kit Waterborne Military Coating

PPG Aerospace Deft 99-GY-013 is a gray MIL-PRF-85285E Type IV, Class H aerospace topcoat — a waterborne formulation specifically developed for military paint facilities subject to strict VOC emission regulations that limit or prohibit the use of conventional solvent-borne aerospace topcoats. Type IV classification under MIL-PRF-85285E designates a waterborne coating, distinguished from Type I (solvent-borne high-solids) by the use of water as the primary carrier for the coating film-forming components.

Waterborne MIL-PRF-85285E Type IV topcoats provide military paint facilities located in air quality non-attainment areas — where conventional solvent-borne coatings cannot be applied under area emission permits — with a qualified alternative that maintains specification-level performance while dramatically reducing the volatile organic compound emissions generated during coating application. This enables continued military aircraft painting operations in environmentally restricted locations without environmental permit violations.

The gallon kit provides the standard production quantity for military painting facilities, with the waterborne formulation requiring attention to application conditions — particularly temperature and humidity — that affect waterborne coating drying and film formation differently than solvent-borne systems.

Technical Information

Deft 99-GY-013 MIL-PRF-85285E Type IV uses a waterborne polyurethane dispersion or water-reducible polyurethane system where the film-forming polymers are dispersed or dissolved in water with minimal solvent content. The polyurethane chemistry provides the UV resistance, chemical resistance, and mechanical properties required by the MIL-PRF-85285E specification, while the waterborne carrier reduces VOC content to a fraction of that of solvent-borne Type I topcoats.

Waterborne coatings are sensitive to application temperature and humidity in ways that differ from solvent-borne systems. Cold, humid conditions slow water evaporation from the applied film, extending drying time and potentially causing solubility or adhesion issues if the film remains wet for extended periods. Hot, dry conditions can cause rapid surface drying that prevents proper film coalescence. Follow the PPG Deft 99-GY-013 application guide for the specific temperature and humidity window for waterborne topcoat application.

Spray equipment used for waterborne coatings must be compatible with water-based materials — stainless steel or suitable plastic components are required; galvanized or bare carbon steel will corrode from waterborne coating contact. Clean equipment immediately after use to prevent waterborne coating from drying and clogging in spray tips and passages.

Why Choose Deft 99-GY-013 Type IV Waterborne?

• ✅ Very Low VOC — Waterborne for environmentally regulated facilities
• ✅ MIL-PRF-85285E Type IV Qualified — Military spec waterborne topcoat
• ✅ Same Military Performance — Meets the same spec as solvent-borne Type I
• ✅ Environmental Compliance — Enables painting in VOC non-attainment areas
• ✅ PPG Deft Quality — Trusted waterborne military aerospace coating

Applications

Deft 99-GY-013 Type IV is used for painting military aircraft in facilities subject to strict VOC emission regulations where conventional solvent-borne aerospace topcoats cannot be used, providing a qualified waterborne alternative for continued military aviation maintenance.

Frequently Asked Questions

Q: What is PPG Deft 99-GY-013 Type IV?
A: 99-GY-013 is a gray MIL-PRF-85285E Type IV waterborne aerospace topcoat — providing military specification performance with very low VOC for use in environmentally regulated military paint facilities.

Q: MPN for Deft 99-GY-013 gallon?
A: MPN is DE99GY013040PV22K.

Q: What is MIL-PRF-85285E Type IV?
A: Type IV designates a waterborne formulation within the MIL-PRF-85285E specification. Unlike Type I (solvent-borne high-solids), Type IV uses water as the primary carrier for very low VOC emissions.

Q: Why use waterborne instead of solvent-borne topcoat?
A: Waterborne Type IV is required at facilities in VOC non-attainment areas where environmental permits prohibit high-VOC solvent-borne coating use. It enables military painting operations to continue in environmentally restricted locations.

Q: Are there special application requirements for waterborne topcoat?
A: Yes. Temperature and humidity significantly affect waterborne coating drying and film formation differently than solvent-borne coatings. Use compatible spray equipment (no bare steel). Follow PPG’s waterborne application guide for correct conditions.