Primer spray Unimet SPRAY 400ML gray — MTP P 7040, 400 ml aerosol primer

Unimet SPRAY 400ML gray is a 400 ml aerosol primer formulated to prepare metal and other substrates for subsequent paint coatings. The gray primer promotes adhesion, offers baseline corrosion protection and helps create an even surface for finishing paints. It is supplied as a ready-to-use spray, suitable for small repairs, touch-ups and routine maintenance tasks where a fast-drying primer layer is required.

Advantages

This spray primer delivers uniform coverage from an aerosol format, reducing the need for complex application equipment. Its gray tint helps ensure consistent color undercoats for many topcoat shades, and the formulation improves adhesion of lacquer and enamel finishes. The product provides basic protection against rust formation during storage and between coats, and its fast-drying characteristics speed up repair and repainting workflows.

Suitable for

• Priming bare or cleaned metal surfaces before painting
• Automotive touch-ups and spot repairs
• Industrial maintenance and equipment refurbishment
• Domestic metalwork such as gates, railings and radiators

When it may not be suitable

This gray aerosol primer is designed for small- to medium-scale priming tasks; it may not be ideal for large area industrial coating projects that require specialized primers or high-build systems. It is not intended as a final decorative coat—topcoats are required to achieve final color, gloss and long-term weather resistance. Avoid use on surfaces that are not compatible with solvent-based aerosols without testing.

Key specifications

• Form: aerosol spray
• Volume: 400 ml
• Color: gray
• Primary function: adhesion promotion and baseline corrosion protection
• Application: spray for small repairs, touch-ups and maintenance

How to use

Ensure the surface is clean, dry and free from loose rust, grease and old flaking paint. Shake the can thoroughly before use and perform a short test spray on a disposable surface. Hold the can at the recommended distance from the surface, apply several thin, even coats allowing flash-off between passes, and let the primer dry according to ambient conditions before applying any topcoat. Use appropriate ventilation and follow safety instructions on the product label.

What to consider before purchase

• Confirm compatibility of this solvent-based aerosol primer with the intended topcoat and substrate
• Assess whether 400 ml provides sufficient coverage for the planned task
• Consider ventilation and safety requirements for aerosol application

Usage recommendations

For best results, remove heavy corrosion and treat any active rust prior to priming. Apply multiple thin coats rather than a single heavy coat, and allow adequate drying time before overcoating to ensure optimal adhesion and finish quality.