Gardner Bender GCD-003 Dielectric Grease
CarCareTruth Score
Mediocre, but wear gloves and ventilate.
Priced as of May 31, 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.
- H334 “May cause allergy or asthma symptoms or breathing difficulties if inhaled.”
GHS Category 1 respiratory sensitizer — classified as capable of inducing asthma-like symptoms or sensitization on inhalation. Once sensitized, reactions can recur at much lower exposure levels.
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. 2015-06-08)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.
EyesSituationalMfr. SDS §8 · 29 CFR 1910.133(a)(1) · GHS H320SkinSituationalMfr. SDS §8 · 29 CFR 1910.138(a) · GHS H316LungsRequiredMfr. SDS §8 · 29 CFR 1910.134(a)(1)–(2) · GHS H334Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“H320 eye irritation is classified in SDS §2. Situational tier with trigger splash_risk — incidental eye contact during aerosol handling is the identified pathway.”
— Gardner Bender
U.S. regulatory standard
29 CFR 1910.133(a)(1)
“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
“H316 mild skin irritation is classified in SDS §2. Aerosol spray application is the identified skin contact pathway.”
— Gardner Bender
U.S. regulatory standard
29 CFR 1910.138(a)
“appropriate hand protection when employees' hands are exposed to hazards such as those from…”
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
“H334 respiratory sensitizer (asthmagen) is classified in SDS §2. The aerosol format creates inhalation risk in enclosed spaces; use outdoors or with ventilation running.”
— Gardner Bender
U.S. regulatory standard
29 CFR 1910.134(a)(1)–(2)
“In the control of those occupational diseases caused by breathing air contaminated with harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors, the primary objective shall be to prevent atmospheric contamination… When effective engineering controls are not feasible… appropriate respirators shall be used.”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
UN GHS hazard statement
H334“May cause allergy or asthma symptoms or breathing difficulties if inhaled”
UN GHS Rev. 9 (2021)
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
No PPE specified in published sources for ventilation. Absence does not imply “not needed” — consult the full Safety Data Sheet.
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 Dielectric Grease
See the full ranking →This product ranks #8 of 9 in Dielectric Grease.Three above it ↓
CarCareTruth's Analysis
Last reviewed May 31, 2026
TL;DR Solid corrosion protection for trailer connectors, battery terminals, and spark plug boots — the aerosol spray reaches crevices a tube can't. Best used outdoors or in a well-ventilated bay, as the aerosol format creates inhalation risk in enclosed spaces.
What it is and how it performs
GCD-003 deposits a protective film that seals out moisture and prevents pin oxidation on trailer plugs, battery terminals, and spark plug boots. The spray carrier flows into crevices and evaporates, leaving a clear, pliable coating. Reviewers confirm it cleared recurring connection-error faults on fifth-wheel trailer connectors after a few applications and holds up on golf cart battery terminals outdoors. The thinner film vs. paste grease means it's not ideal for spark plug boots requiring a heavy seal, but for connectors and terminals it works without disassembly.
Who should buy this — and who should skip it
Best for trailer owners, boaters, and anyone managing corroded multi-pin connectors where a spray can reach without disassembly. Skip it for sealed multi-pin automotive connectors where over-spray could contaminate pin contacts — a syringe-format grease gives better application control for those jobs.
Safety and environmental impact
The SDS classifies DANGER based on H334 respiratory sensitizer chemistry — a real asthmagen code, not boilerplate. Use outdoors or with ventilation running. H316 mild skin irritation and H320 eye irritation are also classified at the mixture level. The product carries a California Prop 65 listing for a solvent ingredient (see SDS §15). Leave-on application means no drain pathway; the silicone residue is not readily biodegradable but per-use volume is small.
Frequently asked questions
Is this an Amazon Add-On item?▾
Yes — this product ships as part of Amazon's Add-On program, which means it can only be purchased when your cart total meets the program threshold. If you're ordering just this item, pair it with another auto supply to qualify.
From the manufacturer
Marketing copy from Gardner Bender, via Amazon. Not editorial.
- •Use on connections susceptible to rain, fog, salt spray and temperature extremes to lengthen the life of connectors and improve their performance
- •Reduces line sag, arcing and voltage drops
- •Safe for the ozone
- •Made in the united states
- •Container size: 10 oz
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Manufacturer videos
Manufacturer images
Manufacturer specifications
- Material
- Silicone
- Brand
- Gardner Bender
- Package Information
- Can
- Liquid Volume
- 10 Fluid Ounces
- Item Weight
- 0.59 Pounds
- Brand Name
- Gardner Bender
- Recommended Uses For Product
- Electrical
- Specific Uses For Product
- Protecting and enhancing electrical connections in adverse conditions such as rain, fog, salt spray, and temperature extremes
- Item Form
- Grease
- Global Trade Identification Number
- 00032076920869
- Manufacturer
- GB Electrical
- Unit Count
- 10.0 Ounce
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