Adhesive spray for paint

The starting point for a paint that grips and lasts: Scaleauto SC-9501 adhesion promoter spray

When we want the paint to adhere perfectly to a slot car body, a model, or any resin or fibre piece, the prior step makes a difference. The SC-9501 from Scaleauto is an adhesion promoter spray specifically formulated to prepare these surfaces before applying colour, saving the priming stage without sacrificing adhesion or finish.

Main features

• Format: 400 ml spray, convenient and long-lasting.
• Finish: transparent, without altering the base colour of the piece or covering details.
• Compatible surfaces: plastics, fibres, and resins.
• Function: improves paint adhesion, eliminating the need for a prior primer application.

Applications

This spray is especially useful on plastic or resin slot car bodies that will receive paint —whether by airbrush, brush, or spray— as well as on static model parts, figures, and diorama elements made from resin or fibre. Its transparent finish makes it suitable even on white or light-coloured surfaces, without creating an opaque layer that obscures the material.

Application tips

• Clean the piece thoroughly before applying the spray: remove grease, dust, or release agents with a soft cloth or isopropyl alcohol.
• Apply in thin, even layers, from about 25-30 cm away, in a well-ventilated area.
• Allow to dry completely before painting. Once dry, the adhesion layer is transparent and invisible.
• Shake the can well before each use to ensure a homogeneous mixture.
• Compatible with acrylic and enamel paints from brands like Vallejo, Kaleido, or Tamiya.

Why use an adhesion promoter spray?

Plastic and resin are low-porosity surfaces, making it difficult for paint to adhere durably. Without proper preparation, the colour layer can chip off with use, especially on pieces that are frequently handled, like slot car bodies. The SC-9501 creates a micro-layer that acts as a bridge between the material and the paint, ensuring a solid grip without the need for sanding or priming.

Frequently asked questions

Is it necessary to prime the body after using this spray?

No. The function of the SC-9501 is precisely to replace that step: after its application, you can paint directly without the need for primer.

Does it alter the colour or appearance of the piece once dry?

No. The finish is completely transparent, so it does not modify the original colour of the body or cover any surface details.

Is it compatible with all types of paints?

It is compatible with the most common paint systems in modelling: acrylics, enamels, and lacquers from brands like Vallejo, Kaleido, or Tamiya. If you have doubts about a very specific paint, we recommend testing it in a less visible area.

Can I use it on standard plastic bodies or only on custom bodies?

It can be used on any plastic, fibre, or resin body, whether they are unpainted from scratch or have already been sanded for customization or repair.

How much does the 400 ml can cover?

The coverage depends on the thickness of the applied layer and the size of the pieces, but the 400 ml format is generous for multiple bodies or modelling parts.

The Scaleauto SC-9501 adhesion promoter spray is the ideal primer alternative for slot car bodies, scale model parts, and resin or fibre pieces. This 400 ml transparent spray enhances paint adhesion on plastic, fibre, and resin surfaces without the need for a separate primer coat. Compatible with acrylic and enamel paints from leading brands, it is an essential step for achieving a durable, professional finish in slot car painting, static scale modelling, and diorama building.