Rust-Oleum Rust Reformer Spray (10.25 oz)
Priced as of May 21, 2026
4.7(11,106 ratings)Buy on AmazonSaved to your guest loadout. Sign up to also save to your Cabinet (consumables) or Kit (tools you own).
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Prices may varyAbout this product's hazards. This product's Safety Data Sheet uses signal word danger. Read the manufacturer's SDS and follow all safety instructions before use. CarCareTruth ratings translate the manufacturer's safety sheet. They do not replace the SDS or substitute for a hazard assessment specific to your task.
Health score is for adult use as intended, per the manufacturer's SDS. It does not model child ingestion, accidental spill cleanup, or off-label use. See the safety panel below for full hazard classification, and /disclaimer for the full editorial scope.
From the Safety Data Sheet
Full SDS ↗ (rev. 2025-11-20)GHS hazard codes are quoted from the manufacturer’s Safety Data Sheet. PPE tiers below translate those codes and the listed ingredient chemistry; they are not CarCareTruth recommendations.
EyesRecommendedMfr. SDS §8 · 29 CFR 1910.133(a)(1) · GHS H319SkinRequiredMfr. SDS §8 · 29 CFR 1910.138(a) · GHS H317LungsRequiredMfr. SDS §8 · 29 CFR 1910.1000 · GHS H351Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“H319 (eye irritation Cat 2A) is present at SDS §2 mixture level. H318 (serious eye damage) is not present — tier is recommended, not required.”
— Rust-Oleum
U.S. regulatory standard
29 CFR 1910.133(a)(1)
“The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from… liquid chemicals…”
ANSI Z87.1 (incorporated via §1910.6)
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
From the manufacturer’s Safety Data Sheet, Section 8
“H317 (skin sensitizer Cat 1) at SDS §2 mixture level — sensitizers can cause allergic dermatitis on subsequent exposures; gloves are required, not merely recommended.”
— Rust-Oleum
U.S. regulatory standard
29 CFR 1910.138(a); 1910.132(d)
“appropriate hand protection when employees' hands are exposed to hazards such as those from skin absorption of harmful substances.”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
From the manufacturer’s Safety Data Sheet, Section 8
“H336 (STOT SE narcotic) in an aerosol delivery format concentrates narcotic vapors above the open-air threshold at typical application distances — the aerosol form factor escalates lungs PPE to required per health.md §PPE tier guidance for aerosol + H336 narcotic.”
— Rust-Oleum
U.S. regulatory standard
29 CFR 1910.1000; 1910.1200
“Each employer shall assure that no employee is exposed [in excess of the PEL]…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
The published Safety Data Sheet for this product does not specify ventilation protection for consumer use.
Workplace context
29 CFR 1910.134(a); 1910.1000
“the primary objective shall be to prevent atmospheric contamination [via] accepted engineering control measures (for example, enclosure or confinement of the operation, general and local ventilation…).”
Triggered by GHS H336 on the SDS.
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
PPE tiers translate the manufacturer’s SDS and U.S. regulatory standards. Not professional safety advice. How we report safety.
The Podium · Top 3 in Rust Converter
See the full ranking →This product ranks #5 of 5 in Rust Converter.Three above it ↓
CarCareTruth's Analysis
Last reviewed May 25, 2026
TL;DR Converts moderate surface rust to a stable flat-black paintable layer — 11,106 reviews at 4.7 stars confirm reliable conversion after wire-brush prep, no media blasting needed. Paintable with oil-based enamel after a 24-hour cure. The DANGER signal word reflects H317 skin sensitizer, narcotic vapors, and Prop 65 components; required-tier respirator and gloves are the chemistry basis.
What it is and how it performs
This aerosol uses zinc phosphate chemistry to convert iron oxide to a flat-black iron phosphate layer. Prep is minimal — wire-brush loose scale, let it dry, and apply; dwell time is 20–40 minutes to tack-free with a 24-hour window before topcoat. Community results on typical surface rust are consistently positive. Designed for oil-based enamel topcoats; urethane clearcoat compatibility has not been independently confirmed.
Who should buy this — and who should skip it
The right call for a home mechanic treating surface rust on body panels, undercarriage seams, or tight spots before repainting — the aerosol format handles overhead and hard-to-reach areas where a brush-on would drip. Skip it for large-area work where a quart of brush-on liquid converter is more cost-effective, or on metal with visible thickness loss — converters stabilize surface rust, they don't restore metal that has thinned.
Safety and environmental impact
The DANGER signal word is driven by H317 skin sensitizer, H336 narcotic vapors, and H351 suspected carcinogen; H222/H229 add extreme flammability risk. Required-tier respiratory PPE and chemical-resistant gloves are the SDS §8 basis; apply outdoors or with full cross-ventilation. Prop 65 warning applies.
Frequently asked questions
Is this a phosphoric acid rust converter?▾
No — Rust-Oleum Rust Reformer is a zinc phosphate formula, not a phosphoric acid formula. The active converter is zinc phosphate (CAS 7779-90-0, 0.1–1%) confirmed in SDS §3. Zinc phosphate reacts with iron oxide on the surface to form a stable iron phosphate complex; it does not work by acidic dissolution. This chemistry is less corrosive than phosphoric acid formulas, which is why there are no H314 (skin corrosion) or H318 (serious eye damage) codes in the SDS §2 mixture classification.
Why does this product have a DANGER signal word if it's not a strong acid?▾
The DANGER signal word is driven by four health H-codes in the SDS §2 mixture classification: H317 (skin sensitizer Cat 1), H319 (eye irritation), H336 (STOT SE narcotic effects from solvent vapors), and H351 (suspected carcinogen Cat 2 from carbon black and ethylbenzene). The flammability codes H222 and H229 also contribute to the DANGER label but are a fire hazard, not a biological health hazard.
Do I need a respirator to use this?▾
The SDS H336 narcotic classification in an aerosol format supports required-tier respiratory PPE. Apply outdoors or with the garage door fully open for cross-ventilation. An organic vapor cartridge respirator is the SDS §8 specification for conditions where airborne concentrations may exceed exposure limits — relevant in semi-enclosed spaces.
Can I paint over Rust-Oleum Rust Reformer?▾
Yes — the manufacturer specifies oil-based enamel topcoat applied after a 24-hour cure window. Community reviewers confirm oil-based and Rust-Oleum 2X Automotive Enamel adhesion. Urethane clearcoat compatibility is not well-documented in independent community testing — stick to oil-based enamel topcoats if adhesion is critical.
Does it work on deep pitted rust?▾
The aerosol delivery limits penetration into deep pits. For moderate surface rust after wire brushing loose scale, community results are consistently positive. On heavily pitted or scale rust, a second coat is commonly recommended; reviewers treating structurally compromised sections report incomplete conversion at the pit base. The aerosol covers about 10 sq ft per can — expect to use multiple cans for a full frame rail or truck bed.
From the manufacturer
Marketing copy from Rust-Oleum, via Amazon. Not editorial.
- •Use on any rusty, metal surface to Instantly convert rust to a flat black, paintable surface that is protected and prevents future rust
- •Oil based formula creates a bond with rusted surface that can be easily painted
- •Dries tack free in 20-40 minutes, allow 24 hours before applying topcoat
- •Unique formula transforms rusted surfaces saving time and effort sanding rust all the way down to bare metal
- •Any-angle spray technology allows the can to be sprayed in any direction, even upside down
Weekly pick
One product, one safety verdict, every week. No spam.
Manufacturer videos
Manufacturer images
Manufacturer specifications
- Brand
- Rust-Oleum
- Color
- Black
- Finish Type
- Matte
- Size
- 10.25 Ounce (Pack of 1)
- Item Volume
- 291 Milliliters
- Special Feature
- Rust Resistant
- Unit Count
- 10.25 Ounce
- Paint Type
- Enamel,Oil
- Specific Uses For Product
- Interior/Exterior
- Surface Recommendation
- Metal
- Brand Name
- Rust-Oleum
- Item Form
- Aerosol
More from Rust-Oleum
More in Rust Converter
Bilt Hamber
Hydrate 80 Rust Killer
CCT 7.7 · RecommendedHealth 9.5
Corroseal
Water-Based Rust Converter Metal Primer
CCT 7.3 · RecommendedHealth 8.8
FDC
Rust Converter ULTRA (1 Gallon)
CCT 6.7 · DecentHealth 5.0
Rust Kutter
Rust Converter
CCT 6.5 · DecentHealth 4.0
As an Amazon Associate and affiliate partner, CarCareTruth earns from qualifying purchases. Full disclosure
Community
0 postsShare how you use this product
Drop a quick comment or post a full review with photos and a star rating.
Sign in to postNew here? Create a free account.
Top Amazon review
↗External — Amazon's most-helpful review for context.