etch primer

Etch primer is a type of primer used in painting and surface preparation, particularly on bare metal surfaces. It contains acidic chemicals (usually phosphoric acid) that "etch" or slightly corrode the metal surface to promote better adhesion of subsequent paint layers. Etch primers also contain zinc phosphate or similar corrosion-inhibiting compounds to help protect the metal from rust.

Key Features of Etch Primer:

• Promotes adhesion: Creates a strong bond between the metal surface and the topcoat.
• Corrosion resistance: Helps prevent rust and oxidation on metal substrates.
• Used on bare metals: Commonly applied to aluminium, steel, galvanized steel, and other non-ferrous metals.
• Thin application: Typically applied in a thin coat; not designed to build thickness like other primers.

Common Uses:

• Automotive refinishing
• Industrial and commercial metalwork
• Metal roofing and cladding
• Marine and aviation applications

In Australia, etch primers are widely used by professional painters and contractors when preparing metal surfaces for painting, ensuring durability and long-lasting finishes.