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Choose your RustGuard™ bundle
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.
The numbers, in one place
| Question | Answer |
|---|---|
| Coverage per bottle | Up to 50 sq ft / 4.6 m² on smooth steel |
| Colour change | 20 minutes to 2 hours |
| Touch dry | 2–4 hours |
| Recoat with converter | After 4 hours |
| Cure before topcoat | 24 hours |
| Application temperature | 10–32 °C / 50–90 °F |
| Shelf life sealed | About 24 months |
| Guarantee | 30 days from delivery |
Before you buy
- Is your metal ferrous? A magnet sticking means yes and the product will work
- Is the metal still solid? Probe it — perforation needs welding, not coating
- Measure the area so you order the right bundle and do not stop mid-panel
- Have a topcoat ready for the day after; the converter is a primer, not a finish
- Allow a dry 24-hour window in the forecast if you are working outside
During the job
- Degrease until water sheets rather than beads — this is the step people skip
- Thin coats. Thick films skin over and trap moisture underneath
- Work into seams, folds and pitting rather than over them
- Any area still orange after curing was contaminated or missed — re-treat it
- Rinse brushes with water immediately; dried film ruins them
Quantity calculator
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
What is a rust converter?
A coating that chemically reacts with iron oxide to form a stable, paintable film, so rusted metal can be painted without being stripped to bare steel.
Does it remove rust?
No. It converts rust in place. A remover strips rust and leaves bare metal — a different product for a different job.
Which metals does it work on?
Steel, cast iron and wrought iron, plus red rust patches on failed galvanising. Not aluminium, stainless, copper or brass.
Do I need to sand first?
Only to remove loose scale and lifting paint. The converter needs rust to react with.
How long before I can paint over it?
24 hours, and ideally within about a week while the surface is still clean.
Do I need a separate primer?
Usually not — the cured film primes the surface for most standard topcoats.
Will it fix a rust hole?
No. Perforated metal needs cutting out and welding.
Can I use it in the cold?
Not below about 10 °C / 50 °F. The reaction stalls and the film will not cure properly.
Is it safe to use indoors?
Yes, with ventilation. It is water-based and low odour.
How much do I need?
About one bottle per 50 sq ft / 4.6 m² on smooth steel, less on heavy pitting. Use the calculator on this page.
Can I spray it?
Yes, through low-pressure equipment suited to water-based coatings. Strain it and flush with water afterwards.
What if it does not turn black?
There was no reachable rust, or the surface was contaminated. Degrease, wire brush and re-apply.
How long does the treatment last?
Years when topcoated and maintained. Bare converted film in an exposed spot lasts considerably less.
Is shipping free?
Free tracked shipping on bundles of 3 bottles and above.
What is the return window?
30 days from delivery on unopened bottles.
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.
- How to use rust converter, step by stepThe full method for applying a rust converter: preparation, degreasing, coats, cure time and topcoating. Written for RustGuard™ but valid for any converter.
- 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.
- Rust converter coverage calculatorWork out exactly how many bottles of RustGuard™ your job needs. Enter your area or pick a common job and get a bundle recommendation.
- Does rust converter actually work?What a rust converter genuinely does, where it outperforms sanding, and the four situations where it will not help at all.
Stock up & save
Choose your RustGuard™ bundle
Ships from our US fulfilment partner, typically 3–7 business days. 30-day money-back guarantee.