• Zinc Phosphate Primer
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ZINC PHOSPHATE PRIMER

ZINC PHOSPHATE PRIMER

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Zinc Phosphate Primer: anti-corrosion primer for steel and galvanised iron

Rhinoluxe Zinc Phosphate Primer is a solvent-based, alkyd anti-corrosion primer for mild steel and weathered galvanised iron. The zinc-phosphate pigment inhibits rust and gives strong adhesion, which makes it an ideal base under decorative undercoats and enamel topcoats. It dries to a durable matt finish built to protect metal in South African conditions.

Key Benefits

  • Anti-corrosion. Zinc-phosphate pigment inhibits rust on steel and galvanised iron.
  • Strong adhesion. Grips mild steel and weathered galvanised surfaces.
  • Great base coat. Ideal under decorative undercoats and enamel topcoats.
  • Durable matt finish. A stable, sandable primer surface.
  • Proven build. Two coats for full corrosion protection.

Technical Overview

Zinc Phosphate Primer uses an alkyd binder carrying zinc phosphate, an anti-corrosive pigment that passivates the metal surface and slows rust. It penetrates and keys to mild steel and weathered galvanised iron, forming a matt film that both undercoats and topcoats bond to easily. Applied in two coats, it builds the film needed to protect ferrous metal against moisture and coastal air.

Specifications

Type Solvent-based alkyd anti-corrosion primer
Substrates Mild steel, weathered galvanised iron
Spreading rate ~5-6 m²/L (about 25-30 m² per 5L)
Touch dry / hard dry 2-3 hours / 16 hours
Finish Matt
Pack sizes 1L, 5L, 20L

Technical Guidance

Remove loose rust, scale and oil, and make sure the metal is clean and dry before priming. Apply two coats, allowing about 16 hours for the first to harden before recoating or topcoating. On weathered galvanised iron, degrease the surface so the primer keys properly. Follow with a decorative undercoat and enamel for a full protective system.

Size
R 2,560.00
R 2,560.00
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Please note: Colour swatches and illustrations displayed are for reference only and may vary from the actual product due to screen settings and batch differences. This product may be custom-made and/or colour-matched to your specification. As such, it is non-returnable and non-refundable. View full details

Questions & Answers

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  • Zinc phosphate or red oxide primer — which is better?

    Zinc phosphate is a more advanced anti-corrosive pigment, preferred for galvanised iron and higher-corrosion areas, while red oxide is a solid, economical primer for mild steel.

  • How much does 5L cover?

    About 25-30 m² per coat, roughly 5-6 m² per litre, depending on the surface.

  • Do I need two coats?

    Yes, apply two coats for full corrosion protection.

  • How long does it take to dry?

    It is touch dry in 2-3 hours and hardens in about 16 hours.

  • Is it a good base under topcoats?

    Yes, it is ideal under decorative undercoats and enamel topcoats.

  • Can it be used on galvanised iron?

    Yes, it protects both mild steel and weathered galvanised iron.

  • What is the best primer for rusted steel?

    Rhinoluxe Zinc Phosphate Primer gives excellent rust resistance and adhesion on mild steel.