PPG® Korotherm® 821X404 Whitish Gray Boeing MMS-458 Spec Fire & Thermal Protective Coating – 5 oz Kit
PPG Korotherm 821X404 by PPG Aerospace is a professional-grade fire & thermal protective coating available in 5 oz Kit format. Designed for application on Aircraft Structures, Titanium, Steel, Fire Zone Areas, it delivers reliable protection, long-term adhesion, and specification-grade coating performance across demanding aerospace, military, and industrial applications. Whitish gray in color, this product is trusted by aerospace engineers, MRO professionals, and coating specialists worldwide who require consistent, specification-compliant coating performance in every application.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 0821X404X0XM205K |
| Brand | PPG Aerospace |
| Product / Model Name | PPG Korotherm 821X404 |
| Color | Whitish Gray |
| Package Size | 5 oz Kit |
| Product Type | Fire & Thermal Protective Coating |
| Specification | Boeing MMS-458 |
| Compatible Substrates | Aircraft Structures, Titanium, Steel, Fire Zone Areas |
Technical Information
PPG Korotherm 821X404 is a whitish gray fire and thermal protective coating meeting Boeing Manufacturing Material Standard MMS-458, designed to provide intumescent or ablative fire and heat protection on aircraft structural members, titanium components, and fire zone surfaces in Boeing commercial aircraft. Thermal protective coatings are applied to aircraft structures at risk of overheating during engine fire events to maintain structural integrity and provide additional time for emergency procedures. The 5 oz kit format is designed for precision maintenance touch-up and small repair operations requiring MMS-458 compliant thermal coating application.
Why Choose PPG Korotherm 821X404?
- Boeing MMS-458 Compliant — Boeing manufacturing standard approved fire & thermal coating
- Fire Zone Structural Protection — Maintains structural integrity during fire events in aircraft fire zones
- Whitish Gray Color — Standard identification color for thermal protective coating systems
- 5 oz Precision Kit — Small kit for maintenance touch-up and repair of existing coating
- PPG Korotherm Series — Trusted PPG Aerospace thermal protective coating technology
Frequently Asked Questions
Q: What is PPG Korotherm 821X404 5 oz Kit used for?
A: PPG Korotherm 821X404 is used for fire and thermal protection of aircraft structural members, titanium components, and fire zone surfaces in Boeing commercial aircraft where Boeing MMS-458 specification thermal coating compliance is required.
Q: What is the MPN for PPG Korotherm 821X404 5 oz Kit?
A: The Manufacturer Part Number (MPN) is 0821X404X0XM205K.
Q: What specification does PPG Korotherm 821X404 meet?
A: PPG Korotherm 821X404 meets Boeing Manufacturing Material Standard MMS-458 for fire and thermal protective coatings applied to aircraft structural components in fire zone areas.
Q: What is the difference between the 5 oz kit and the gallon kit?
A: Both contain the same PPG Korotherm 821X404 MMS-458 thermal coating. The 5 oz kit is for precision maintenance touch-up and small repair areas, while the gallon kit is for larger-scale thermal coating application in production or heavy maintenance operations.
Q: How is PPG Korotherm 821X404 applied and cured?
A: Consult the current PPG Korotherm 821X404 product datasheet and the applicable Boeing aircraft maintenance documentation for application, thickness, and cure requirements for MMS-458 compliant thermal coating application.
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