Priced as of May 25, 2026
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Prices may varySerious hazard — read before use
The manufacturer's Safety Data Sheet classifies this product with one or more GHS Category 1 health hazards — the most severe tier. The hazard statements in quotes below are the verbatim GHS language from the SDS, as required by OSHA's Hazard Communication Standard. The line under each statement translates the GHS classification into plain language.
- H350 “May cause cancer.”
GHS Category 1 carcinogenicity — classified as suspected of causing cancer with repeated or prolonged exposure.
If swallowed, inhaled, or splashed in eyes:
Call Poison Control immediately at 1-800-222-1222 (US, 24/7, free) and have the product container with you. Poison Control's standing guidance is to not induce vomiting after chemical exposure; they will direct first-aid steps based on the specific product.
About 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. 2026-04-21)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 H319SkinRecommendedMfr. SDS §8 · 29 CFR 1910.138(a) · GHS H315LungsRequiredMfr. SDS §8 · 29 CFR 1910.1003 · GHS H350Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“H319 (eye irritation, Cat 2) is in the SDS §2 mixture classification. Overhead aerosol application in a semi-enclosed under-vehicle posture creates realistic splash and mist contact with the eyes.”
— U-POL
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
“H315 (skin irritation, Cat 1/2) is in the SDS §2 mixture classification. Petroleum solvent carrier at significant concentration warrants gloves during any application involving direct contact or overspray.”
— U-POL
U.S. regulatory standard
29 CFR 1910.138(a)
“appropriate hand protection when employees' hands are exposed to hazards such as those from… chemicals which produce an adverse effect on the skin or eyes…”
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
“H370 (STOT SE Cat 1 — causes damage to organs through single inhalation exposure) and H350 (confirmed carcinogen, Cat 1A) are in the SDS §2 mixture classification. H336 (narcosis, STOT SE Cat 3) is also present. Overhead aerosol application in a semi-enclosed garage with these §2 classifications means the SDS §8 half-face respirator with organic vapor cartridges is not optional — the classification calls for it.”
— U-POL
U.S. regulatory standard
29 CFR 1910.1003; substance-specific 1910.1001–1910.1052
“Each employer shall ensure that no employee is exposed [in excess of the substance-specific 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 Undercoating
See the full ranking →This product ranks #6 of 6 in Undercoating.Three above it ↓
CarCareTruth's Analysis
Last reviewed May 26, 2026
TL;DR U-POL's petroleum-solvent aerosol undercoating lays down a hard black textured film on bare metal, but it launched in July 2024 and community evidence is too thin to confirm multi-season corrosion protection. The SDS carries a confirmed carcinogen classification and a single-exposure organ-damage classification at the mixture level; SDS §8 specifies a half-face respirator with organic vapor cartridges for overhead aerosol application.
What it is and how it performs
Petroleum-solvent based aerosol undercoating — not rubberized asphalt or bitumen. Ester and aromatic hydrocarbon solvent carriers leave a hard textured black film; manufacturer claims rust prevention and sound deadening. Shake, spray overlapping wet coats; aerosol wand coverage of frame rails is manageable from a creeper. Reviewers confirm the application works, but 79 reviews with no multi-season follow-up and no salt-belt geography means durability cannot be independently verified.
Who should buy this — and who should skip it
The right buyer is rustproofing a clean undercarriage and can accept an unproven multi-season track record. Skip it over active rust perforation — undercoating traps moisture over corroding metal; a rust converter is the correct first step. Also skip it in a sealed garage with no airflow: the carcinogen and organ-damage §2 classifications make enclosed aerosol use genuinely hazardous.
Safety and environmental impact
DANGER is health-code-driven at the §2 mixture level: the SDS carries a confirmed carcinogen classification (from crystalline silica — a filler present at 0.1–1% by weight), a single-exposure organ-damage classification, narcosis, and repeat-exposure organ concerns. The carcinogen classification for crystalline silica is based on inhalation of respirable silica particles — a risk primarily associated with grinding or sanding cured material, not with wet aerosol spray application. Prop 65 confirmed on the product label. SDS §8 specifies a half-face respirator with organic vapor cartridges for overhead aerosol application. VOC estimated at ~360 g/L from §3 ingredient concentrations; the product is CARB-registered (MIR CARB ABP 0.95 lbs/gal per back label), which reflects regulatory air-quality compliance accounting — not elimination of solvent emissions. Primary solvents are biodegradable per SDS §12; no aquatic toxicity at §2 mixture level. Product cures on the vehicle and does not rinse to drains.
Frequently asked questions
Is U-POL Protective Undercoating Spray safe to use?▾
The Safety Data Sheet for U-POL Protective Undercoating Spray carries a DANGER signal word, with classified hazards including H222 (extremely flammable aerosol); H229 (pressurized container: may burst if heated); H315 (causes skin irritation). The Amazon listing also carries a California Prop 65 warning. See the PPE breakdown above for use-case-specific guidance translated from the SDS hazard codes.
How does U-POL Protective Undercoating Spray score on CarCareTruth?▾
CarCareTruth scores U-POL Protective Undercoating Spray at 5.3 out of 10 on the composite CCT score, with a health sub-score of 1.0/10. The CCT score blends real-world effectiveness, ingredient health impact pulled from the manufacturer's safety sheet, and environmental footprint against a published category rubric. See the methodology link on this page for the full scoring breakdown.
What's in U-POL Protective Undercoating Spray?▾
Per the Safety Data Sheet ingredient disclosure: SDS §3 (Version 2.02, 04/21/2026): Methyl acetate (CAS 79-20-9) ≥15–≤40%; Reaction Mass of Ethylbenzene, m-Xylene and p-Xylene ≥5–≤10%; Hydrocarbons, C9-C10, n-alkanes, isoalkanes, cyclics, <2% aromatics (CAS 64742-48-9) ≥3–≤7%; Castor oil, sulfated, sodium salt (CAS 68187-76-8) ≥0.5–≤1.5%; Carbon black, non respirable (CAS 1333-86-4) ≥0.1–≤1%; Quartz (crystalline silica, CAS 14808-60-7) ≥0.1–≤1%. Aerosol propellant (propane/butane/isobutane) listed in sta…
From the manufacturer
Marketing copy from U-POL, via Amazon. Not editorial.
- •PREMIUM FORMULATION: The U-POL Undercoating Spray is a high-quality, hard-wearing, protective coating for use on prepared metals, painted and primed surfaces, aluminum, rigid plastics, and fiberglass.
- •PRO TIP: For best results, good preparation is essential. Clean & degrease the area - removing dirt, oil, grease & wax. Abrade with grit sandpaper for each respective substrate and always mask off surrounding areas as needed to protect from overspray.
- •ANTI-RUST PROTECTION: This formula provides a textured finish that acts as a barrier to prevent rust, whilst protecting surfaces like vehicle underbodies, wheel wells, tailgates, fenders, trailers, running boards, and roll bars from stone & debris damage.
- •EASY TO USE: This spray is not only easy to use but helps to deaden sound and can be overpainted for a customized look & finish. The spray nozzle design has anti-clog technology allowing for ease of use and steady application.
- •U-POL POWER & RAPTOR TOUGH: U-POL & RAPTOR are World leaders in automotive refinishing with a wide range of comprehensive products specializing in driving surface perfection including fillers, coatings, aerosols, adhesives, & truck-bed liners.
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Manufacturer images
Manufacturer specifications
- Manufacturer
- U-POL
- Brand
- U-POL
- Item Weight
- 1.17 pounds
- Package Dimensions
- 9.33 x 2.4 x 2.36 inches
- Manufacturer Part Number
- UP2105
- ASIN
- B0D9P3FZHY
- Customer Reviews
- 4.4 4.4 out of 5 stars (79) 4.4 out of 5 stars
- Best Sellers Rank
- #503,583 in Automotive (See Top 100 in Automotive) #41 in Undercoatings
- Date First Available
- July 18, 2024
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Top Amazon review
↗External — Amazon's most-helpful review for context.
It's works
Spray great coat of black!!