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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.
Where rust shows up first
The areas worth checking before you order.
- Exposed reinforcement in spalled beams, columns and soffits
- Balcony and walkway edge reinforcement
- Lintels and window head reinforcement
- Retaining wall and parapet reinforcement
- Embedded steel fixings, cramps and lintel bearings
- Precast panel reinforcement at damaged corners
Step-by-step on this job
- 01
Break out to sound concrete
Cut back beyond the damage, undercutting the edges so the repair mortar keys in properly.
- 02
Clean the reinforcement
Needle gun or wire brush the bar on all sides, including the back face. Loose scale left behind guarantees a repeat failure.
- 03
Assess the steel
Measure remaining diameter. Significant loss means supplementary reinforcement, designed by an engineer.
- 04
Convert the bar
Brush the converter over the full circumference of the exposed steel and let it cure.
- 05
Reinstate per the mortar system
Apply the specified bonding primer and repair mortar, then match the surface finish.
What not to do
The cautions that save a re-do.
- Section loss in reinforcement is a structural matter — get an engineer's assessment
- Break out concrete until you reach sound material behind and around the steel
- The converter is not a bonding agent; use the repair mortar's own primer system as specified
- Follow the mortar manufacturer's instructions where they conflict with general guidance
Typical quantities
A starting point based on the jobs customers order for most often.
| Job | Bottles |
|---|---|
| Small spall repair, one lintel | 1 bottle covers several |
| Balcony edge, 10 ft run | 1 bottle |
| Column repairs, several locations | 2 bottles |
| Walkway soffit, large area | 3 bottles |
| Multi-unit remedial programme | 5–8 bottles |
Work out your exact quantity
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
Is a converter a substitute for a rebar primer?
Not always. Many repair mortar systems specify their own bar coating. Where the specification allows a converter, this is a good one; where it does not, follow the specification.
Can I skip breaking out the concrete?
No. Chloride-contaminated concrete around the bar keeps corroding the steel regardless of what you coat it with.
Does this fix structural cracking?
No. Cracking is a structural symptom and needs an engineer, not a coating.
How much bar can I treat with one bottle?
A single bottle goes a long way on bar — coverage is measured in surface area, and bar has far less than a flat panel.
Keep reading
- Rust converter for industrial and structural steelMaintenance coating for structural steelwork, plant, tanks and handrails. Coverage planning, prep grades and topcoat systems.
- Rust vs corrosion: what's the difference?Rust is one type of corrosion — the iron kind. Why that distinction decides whether a rust converter will work on your metal at all.
- 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 safety, storage and disposalPPE, ventilation, storage temperatures, spill handling and correct disposal for water-based rust converter. Practical safety guidance.
- Rust prevention guideA practical prevention programme for vehicles, tools and outdoor steel — coatings, drainage, storage, salt management and an inspection schedule.
Stock up & save
Choose your RustGuard™ bundle
Ships from our US fulfilment partner, typically 3–7 business days. 30-day money-back guarantee.