Rust Treatments & Undercoats

Rust Treatment + Undercoat Selection — Quick Reference

Rust treatment workflow: assess corrosion state → strip loose rust → convert/neutralise existing rust → prime → topcoat. Each step has specific products. Skipping steps = paint failure within months. Selection by surface condition + product role.

Critical sequence: Mechanical prep (wire brush / sand blast / grind) → degrease (CRC Brakleen or similar) → rust converter if needed → primer → topcoat. NEVER skip primer — direct topcoat over bare steel = peel within 6-12 months. Brands: Galmet, CRC, Loctite, Pacer, Triple7, CorrosionX, Dy-Mark. Companion: specialty paint, canned paint, corrosion inhibitor.

Rust Treatments and Undercoats: Rust Converters, Inhibitors and Cold Galvanising Compounds from Galmet, CRC, Loctite, Pacer, Triple7, CorrosionX and Dy-Mark

AIMS Industrial stocks a range of rust treatments and undercoat products from from Galmet, CRC, Loctite, Pacer, Triple7, CorrosionX and Dy-Mark.

Our range covers the full corrosion treatment sequence — from rust converters that chemically neutralise existing rust and prepare the surface for coating, through to cold galvanising compounds and zinc-rich undercoats that provide ongoing cathodic protection to bare steel.

These products are used in industrial maintenance, structural steel fabrication, marine, agricultural and general workshop environments across Australia.

Rust Treatment Products

• Rust Converters: Rust converters chemically react with iron oxide (rust) to convert it into a stable phosphate compound, stopping active corrosion and creating a primer-receptive surface. Galmet and CRC supply brush-on and spray rust converters for structural steel, equipment and vehicles.
• Cold Galvanising Compounds: Galmet cold galvanising compounds contain high-zinc content to provide cathodic corrosion protection to bare steel — similar to hot-dip galvanising but applied by brush, roller or spray. Used for touch-up of galvanised steel, field repairs and new steel protection in marine, agricultural and industrial environments.
• Zinc-Rich Primers and Undercoats: Zinc-rich undercoats applied over cleaned or rust-converted steel provide a high-build corrosion barrier and a sound base for topcoat paint systems. Available in aerosol for site repairs and bulk for workshop application.
• Rust Inhibitors: Rust inhibitors penetrate metal surfaces and displace moisture to prevent new rust formation. CorrosionX and CRC supply rust inhibitor sprays and fluids for protecting tools, equipment, stored metal parts and machinery from corrosion during storage and service.
• Biodegradable Rust Treatments: Triple7 supplies biodegradable rust treatment and inhibitor products for environments where conventional solvent-based corrosion products are restricted.
• Pacer and Dy-Mark: Pacer and Dy-Mark supply aerosol rust treatments and undercoat products for workshop, site and maintenance use.

Expert Support: Need help buying the right product for your application? Contact our team for application-specific advice or request a quote.

Australian Business, Local Supply: As a proudly Australian business since 1988, we supply industrial maintenance chemicals and corrosion protection products to manufacturing, maintenance and trade customers across Australia.

Also see our degreasers, lubricants, paints & coatings, adhesives & sealants and maintenance chemicals ranges.

People Also Ask — Rust Treatments and Undercoats

Q: What rust treatments does AIMS stock?

Penetrating rust converters (chemically converts rust to stable iron tannate), POR-15 rust paint (penetrating coating that locks down loose rust), Hammerite-style rust-direct paint (applies over rust), cold-galvanising paint (zinc-rich coating for steel), rust inhibitor spray (preventative protection on clean metal), and specialty rust treatments. Brand mix includes CRC, Inox, Galmet, ROCOL, and specialty industrial rust treatments. Match treatment to extent of rust and surface preparation feasibility. See [Rust Remover Guide](/blogs/product-guides/rust-remover-guide).

Q: Rust converter vs sand-blast and prime?

Rust converter: chemical treatment converts rust to stable compound, less surface prep required (rough wire-brush sufficient), can be applied in less ideal conditions. Best for spot rust treatment and refurbishment work. Sand-blast and prime: complete removal of rust to bare metal + primer + topcoat. Higher cost but longer-lasting and more reliable. Best for new construction and critical assets. For workshop touch-up: rust converter. For asset refurbishment: full prep and prime.

Q: How do I apply rust converter?

Remove loose rust with wire brush or sanding (don't need to reach bare metal). Wipe with damp cloth to clean. Apply rust converter with brush or roller per product instructions. Allow to dry (typically converter turns black as it cures). Apply additional coats per product spec. After full cure, topcoat with compatible paint. Don't apply over wet or oily surfaces — converter won't penetrate. Don't apply on hot surfaces — accelerates the chemistry uncontrollably.

Q: Hammerite-style direct-to-rust paint?

Hammerite Direct to Rust paint: applies over light rust without primer, contains rust-inhibiting pigments, gives a hammered or smooth finish. Cost-effective for workshop touch-up where full surface prep isn't practical. Standard for railings, machinery touch-up, and outdoor equipment refurbishment. Don't expect Hammerite-style paint to perform like full sand-blast-and-prime system — service life is shorter but acceptable for touch-up applications.

Q: What rust preventative for stored equipment?

Long-term storage (months to years): use a wax-based rust preventative (Lanotec, CRC Soft Seal, ROCOL Plus, or similar) — provides a temporary protective film that can be wiped off when equipment returns to service. For long-term outdoor storage, additional cover essential. For short-term protection of clean metal surfaces (between operations), light spray of CRC 5-56 or Inox MX3 provides moisture displacement. Match preventative to expected storage duration.