AGS Dielectric Silicone Grease Compound
Priced as of May 17, 2026
4.7(705 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 varyFrom the Safety Data Sheet
Full SDS ↗ (rev. 2019-03-29)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 §8SkinSituationalMfr. SDS §8LungsSituationalMfr. SDS §8Ventilation—No PPE in published sourcesShow details for all categories ▾Hide details ▴
From the manufacturer’s Safety Data Sheet, Section 8
“SDS §8 states 'None required for consumer use.' No H318/H319 in §2. Label caution says 'Avoid contact with eyes' — consumer-label language without GHS classification basis. Situational tier applied for splash-risk scenarios only (tube dispensing).”
— AGS
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
“SDS §8 states 'No special protective equipment required.' No H315/H317 in §2 GHS classification. Label says 'avoid contact with skin.' Situational for prolonged or repeated exposure (e.g., commercial mechanic servicing connectors all day).”
— AGS
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
“No H330/H331/H334/H335 in §2. Silicone paste is non-volatile (flash point 149°C). Per health.md, `not_needed` is invalid for chemical products — situational with enclosed_space trigger is the minimum valid tier. In practice no vapor pathway exists at ambient temperatures.”
— AGS
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.
CarCareTruth's Analysis
Last reviewed May 17, 2026
TL;DR Reliable protection for spark plug boots, trailer connectors, and battery terminals, with the label confirming operation to 400°F (204°C). The 4 oz tube works well for most home service tasks; a syringe format would give finer control on multi-pin connectors.
What it is and how it performs
AGS DS-4 is a silicone paste that seals moisture and corrosion from connector pins, spark plug boots, and battery terminals. A thin coat inside a plug boot keeps the rubber from fusing to the plug and allows clean separation at the next service; a dab on each pin prevents oxidation. The manufacturer rates it from -40°F to +400°F — adequate for underhood locations near exhaust sensors. Community ratings are strong at 4.7 stars across more than 700 Amazon reviews. AGS has made dielectric products in Muskegon, Michigan since 1931 and the DS-4 meets OEM specifications; it's stocked at major auto parts chains alongside premium alternatives.
Who should buy this — and who should skip it
Best for DIY owners doing spark plug service, maintaining trailer electrical connections, or protecting battery terminals in wet or salt-belt conditions. The 4 oz tube is a good fit for regular service intervals. Skip it if you need a single connector covered once — a 3 g single-use packet will do the job without the tube commitment.
Safety and environmental impact
The SDS (rev. 2019-03-29) classifies the product as not hazardous under US OSHA HCS — no signal word, no GHS pictograms, no H-codes. No PPE is indicated by the chemistry; the label's consumer caution language has no underlying GHS classification. The silicone base is non-volatile (flash point 149°C), so no inhalation pathway exists at ambient temperatures. Polydimethylsiloxane is not readily biodegradable, but leave-on use in gram-level quantities leaves a minimal environmental footprint.
Frequently asked questions
Is AGS DS-4 safe for rubber spark plug boots?▾
Yes — the product label specifically calls out spark plug boots as a primary use case, and AGS notes it aids the installation of rubber parts. Silicone-based dielectric greases are broadly compatible with the EPDM rubber used in modern OEM plug boots.
Does AGS DS-4 contain any Prop 65 chemicals?▾
No. The SDS (rev. 2019-03-29) explicitly states 'This product does not contain any Proposition 65 chemicals.' The Amazon listing flags Prop 65, but this appears to be a database error inconsistent with the manufacturer's SDS.
What temperature range does the AGS DS-4 handle?▾
The product label states an operating range of -40°F to +400°F (-40°C to +204°C), which covers typical underhood temperatures including sensors near exhaust systems.
Can I use AGS DS-4 on battery terminals?▾
Yes — battery terminals are explicitly listed on the product label and in the manufacturer's recommended use list. A thin coat on the terminal post and cable end protects against the corrosion and oxidation that reduces electrical conductivity.
Is this the same as petroleum jelly / Vaseline?▾
No. AGS DS-4 is silicone-based, not petroleum-based. Petroleum-based greases can degrade rubber components over time and have lower maximum temperature ratings. Silicone grease is the correct choice for rubber boot protection and high-heat ignition applications.
From the manufacturer
Marketing copy from AGS, via Amazon. Not editorial.
- •Essential for all electronic and standard ignitions, this dielectric grease dielectric compound enhances performance and longevity. Protects against moisture and corrosion, ensures optimal conductivity, and is ideal for various applications including sensor connections, spark plug boots, and battery terminals. Suitable for high-energy and traditional systems, it improves electrical connectivity and reduces voltage leaks, ensuring efficient ignition and engine performance.
- •Meets OEM specifications: This dielectric grease dielectric compound is specifically formulated to align with original equipment manufacturer standards, ensuring compatibility and optimal performance for both electronic and standard ignitions. Protects against moisture, corrosion, and enhances electrical connectivity, ideal for various vehicle applications.
- •Effective for High Energy Ignition Systems: This dielectric grease dielectric compound is specially designed to function with high energy ignition systems, meeting OEM specifications. It offers protection against moisture and corrosion, enhances electrical connectivity, and is ideal for a variety of automotive applications.
- •Seals Out Moisture and Corrosion: This dielectric grease dielectric compound is expertly crafted to provide a robust barrier against moisture and corrosion, crucial for maintaining the integrity of high energy ignition systems and meeting OEM specifications. Ideal for automotive use, it ensures enhanced electrical connectivity and longevity.
- •Versatile Applications: Recommended for use in sensor connections, computer connections, solenoids, truck pigtails, plugs, ignition modules and coils, marine connections, lighting systems, batteries, and terminals. This dielectric grease dielectric compound excels in a wide range of automotive and marine settings, providing moisture and corrosion protection while ensuring optimal electrical connectivity.
Weekly pick
One product, one safety verdict, every week. No spam.
Manufacturer videos
Manufacturer images
Manufacturer specifications
- Material
- Silicone
- Brand
- AGS
- Package Information
- Tube
- Liquid Volume
- 0.12 Liters
- Item Weight
- 0.3 Pounds
- Brand Name
- AGS
- Recommended Uses For Product
- Electrical,Truck
- Specific Uses For Product
- Automotive and marine electrical systems, Electrical connections
- Item Form
- Grease
- Manufacturer
- AGS
- Unit Count
- 4 Ounce
- UPC
- 077146133060
More in Dielectric Grease
Permatex
Dielectric Tune-Up Grease, 3 oz
CCT 7.3 · RecommendedHealth 9.5
Mission Automotive
Silicone Dielectric Grease Paste, 8 oz
NO SDSCCT 6.2 · Decent
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.
Good
What you expect keep connecting clean