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Prices in USD. Free tracked shipping on 3-bottle bundles and above.
Rusted metal in, paint-ready surface out
Brush RustGuard™ over sound rust, let it cure, then paint. Images are illustrative — results depend on surface condition and preparation.
Why the primed film matters
The converted layer is not just inert, it is keyed. As the coating dries, the polymer binds the converted oxide into a matte film with exactly the surface profile paint wants. That is why a separate etch or metal primer is redundant for most systems.
It also means fewer failure points. Every extra coating interface in a system is another place adhesion can let go. One product doing two jobs is one interface less to worry about.
Check your topcoat's data sheet if it specifies its own primer. Where it does, follow the sheet. For alkyd enamels, acrylic metal paints, chassis coatings and most rattle-can finishes, the cured converter is your primer.
Specification
- Function
- Rust converter and primer in one
- Base
- Water-based, low odour
- Coverage
- Up to 50 sq ft / 4.6 m² per bottle
- Colour when cured
- Matte dark grey to black
- Cure before topcoat
- 24 hours
- Topcoat window
- Up to about 7 days
- Application
- Brush, roller or low-pressure spray
- Separate primer needed
- No, for most standard topcoats
One product vs three
| Step | Traditional | With RustGuard™ |
|---|---|---|
| Remove rust | Sand, blast or acid strip | Not required — convert in place |
| Neutralise / rinse | Required after acid | Not required |
| Prime | Separate metal primer | Included in the same coat |
| Wait time | Two cure cycles | One 24-hour cure |
| Topcoat | Yes | Yes |
How much primer-converter do you need?
Area
100 sq ft
Bottles needed
3
Recommended bundle
×3 — $42
Based on up to 55 sq ft per bottle on smooth steel, adjusted for surface condition. Estimates only — measure generously.
Frequently asked questions
Do I still need a separate primer?
For most standard topcoats, no — the cured film primes the surface. If your paint's data sheet names a required primer, follow it.
Can I use it as a primer on bare metal?
It is designed for rusted steel. On fully bare metal, a dedicated etch primer is the better choice.
Does it work under 2K paint systems?
Generally yes, once fully cured. Check the system's data sheet for compatibility on anything high-value.
How long before the topcoat?
24 hours minimum, and ideally within a week while the surface is clean.
Keep reading
- Rust converter for iron and steel that leaves a paint-ready surfaceRustGuard™ rust converter reacts with existing rust and leaves a stable, primed surface you can paint. Bundles from $24 with worldwide shipping.
- Rust converter paint: convert and prime in the same coatRustGuard™ works as a rust converter and primer in one coat — convert corrosion, then topcoat after 24 hours. Bundles from $24.
- How to paint over rust properlyPainting straight over rust always fails. Here's the correct sequence — prep, convert, cure, prime, topcoat — and the paints that work over a converted surface.
- Rust converter drying and cure timeColour change, touch dry, recoat and topcoat windows for rust converter — plus how temperature and humidity change every one of them.
- How to choose the best rust converter for your projectSeven criteria that separate a good rust converter from a bad one — coverage, cure time, topcoat compatibility, and honest limits.
Stock up & save
Choose your RustGuard™ bundle
Ships from our US fulfilment partner, typically 3–7 business days. 30-day money-back guarantee.