D8421 - PPG G5 light gray 1K primer spray 400ml

PPG D8421 is a 1K single-component primer spray designed for small, localized repairs and areas sanded back to bare metal. Ready to use and fast-drying, it efficiently prepares various substrates before the direct application of compatible PPG topcoat systems.

Technical specifications

• Part number: D8421
• Brand: PPG
• Type: 1K single-component primer spray
• Packaging: 400 ml spray
• Use: Small, localized repairs and areas sanded back to bare metal
• Preparation: Ready to use
• Spray distance: 15 to 20 cm
• Number of coats: 2 single coats
• Film thickness: Approximately 25 microns minimum
• Time between coats: 3 to 5 minutes
• Time before recoating: 10 to 15 minutes at 20 °C, depending on film thickness
• VOC: Maximum 840 g/L in ready-to-use form

Compatible substrates

• Bare steel
• Galvanized steel
• Original paintwork
• Glass-reinforced plastic (GRP)
• Polyester body fillers
• Old finishes in good condition and properly cured

Benefits

• Fast drying allows recoating after just 10 to 15 minutes at 20 °C
• Ready-to-use, single-component product that requires no mixing
• Quick and easy application thanks to its spray packaging
• Ideal for small repairs and localized bodywork repairs
• Compatible with various substrates commonly encountered in automotive repair
• Generally requires no sanding after application before topcoating
• Can be directly overcoated with PPG Deltron UHS, Envirobase and Envirobase HP topcoat systems

Directions for use

• Substrate preparation: Thoroughly degrease the surface before and after each sanding operation with a suitable PPG cleaner.
• Sanding before 2K high-build primer: P280 to P320 for wet or dry hand sanding, P400 for GRP, or P220 to P280 for dry machine sanding.
• Sanding before direct topcoat application: P800 for wet or dry hand sanding, or P360 for dry machine sanding.
• Preparing the spray can: Shake the can for approximately 2 minutes, until the mixing balls can be heard.
• Application: Spray from a distance of 15 to 20 cm and apply 2 single coats.
• Flash-off: Allow 3 to 5 minutes between coats.
• Recoating: At 20 °C, wait approximately 10 to 15 minutes before applying the topcoat, depending on film thickness.
• Sanding: D8421 generally does not need to be sanded after application before being overcoated with a compatible PPG topcoat.
• Additional film thickness: If greater film thickness is required, a suitable PPG high-build or 2K primer can be applied over D8421.

Safety

• Product intended for professional use only.
• Extremely flammable spray and pressurized container; may burst if heated.
• Causes skin irritation.
• Causes serious eye damage.
• May cause drowsiness or dizziness.
• Harmful to aquatic life with long-lasting effects.
• Keep away from heat, hot surfaces, sparks, open flames and other ignition sources.
• Do not expose to temperatures above 50 °C.
• Use only in a properly ventilated area.
• Wear appropriate personal protective equipment during application.
• Avoid inhaling vapors and mists, and avoid contact with skin and eyes.
• Refer to the Safety Data Sheet before use.

PPG D8421 is a practical solution for quickly preparing small bodywork repairs. Its ready-to-use spray format, fast drying and compatibility with several substrates help reduce preparation time before applying PPG topcoat systems.

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