Acrylic Primer VALLEJO 70.640 White, liquid solvent-free primer 17 ml

VALLEJO 70.640 is a white acrylic liquid primer supplied in a 17 ml bottle, formulated for use as a base coat on models, miniatures and craft projects. The solvent-free primer prepares surfaces for subsequent paint layers, improves adhesion and creates a uniform base for detailed airbrushing or brush painting. It is part of the Mecha line engineered for extra resistance and impact protection on surfaces subject to rough handling and intensive finishing work.

Advantages

The Mecha formulation in this acrylic primer provides exceptional adherence and resistance to friction, impact and scratches while maintaining fine surface detail. Once dry, the primer yields a satin-like finish that integrates with the original plastic look of the model. It is suitable for airbrushing or brushing, dries to a hard, homogeneous coating after multiple thin layers, and is solvent-free for safer handling.

Suitable for

• Priming plastic model kits and miniatures prior to painting
• Preparing small craft projects and detailed surfaces for airbrush work
• Use where extra resistance to handling and abrasion is required

When it may not be suitable

This primer is designed for small-scale hobby use and comes in a 17 ml bottle; it may not be practical for large professional projects that require larger volumes. Very porous or untreated materials may still need specific surface preparation or a dedicated adhesion promoter before applying the primer.

Key specifications

• Color: White
• Finish: Satin
• Base: Acrylic, solvent-free
• Volume: 17 ml
• Application methods: Airbrush or brush
• Recommended compressor setting for airbrushing: 15–20 PSI (approx. 0.5–1 kg/cm²)

How to use

Shake the bottle before use. For best results apply the primer in several thin layers over a previously cleaned and, if needed, pre-primed surface. Mecha primers can be airbrushed directly or diluted with an appropriate Vallejo airbrush thinner or flow improver; they can also be applied with a brush. Allow a few hours of drying time between coats and before handling so the coating develops full hardness and adhesion.

What to consider before purchase

• Volume: 17 ml may be limited for larger projects
• Surface preparation: ensure the model surface is clean and free of oils
• Application method: confirm you have an airbrush and thinner available if you plan to airbrush

Usage recommendations

For airbrushing use Vallejo Airbrush Thinner or Flow Improver for optimal spray behavior and Vallejo Airbrush Cleaner for maintenance; apply multiple thin coats with 15–20 PSI compressor pressure and allow full drying time between coats.