CarCareTruth Score
Decent.
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Prices may varyHealth 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.
No Safety Data Sheet on file.
CarCareTruth has not received a Safety Data Sheet from the manufacturer for this product. Hazard classification and PPE cannot be cited. Request an SDS from the manufacturer before use.
This product ranks #6 of 9 in Dielectric Grease.Three above it ↓
Last reviewed June 14, 2026
TL;DR The 8 oz jar with built-in brush is a practical format for multi-pin connectors and spark plug boots; a strong community signal, highly rated by a large owner base, backs the protection performance. The health score of 5.0 reflects no SDS on file · not a confirmed hazard.
Mission Automotive's silicone dielectric paste seals moisture and corrosion from connector pins, spark plug boots, and battery terminals. The jar-and-brush format makes it easier to apply a controlled amount on multi-pin trailer plugs than squeezing from a standard tube. The product is highly rated by a large base of owners on Amazon, suggesting consistent results in real-world use. The label claims a temperature range of -55°F to 570°F; the 570°F figure likely reflects the auto-ignition point rather than a continuous service rating, so performance near exhaust-adjacent sensors isn't independently confirmed.
Good choice for trailer owners or anyone maintaining multi-pin electrical connectors who wants a brush-on format instead of squeezing a tube. The 8 oz size makes sense for fleets or regular service intervals. Skip it if you need SDS documentation for a workplace or commercial application · no SDS is available for this product.
No SDS was located for this product. PPE tiers are applied at the minimum defensible level for a silicone paste: situational eye and skin protection during application, situational lung protection in enclosed spaces. The health score of 5.0 reflects this data gap. The silicone base is non-volatile and leaves no drain-pathway residue in normal leave-on connector use.
CarCareTruth couldn't locate a Safety Data Sheet (SDS) for this product. A score of 5.0 is the default applied when no SDS is on file · it reflects a data gap, not a confirmed chemical hazard. The formula is silicone paste, which is typically low-risk, but we can't confirm specific classifications without the SDS.
Possibly not as a continuous service temperature. The 570°F figure appears to be the auto-ignition temperature rather than a stable operating range. For underhood connector protection, a silicone paste rated to 200·300°F for continuous service is typical; this product likely performs in that range but the 570°F label claim should be read with skepticism.
The built-in brush lets you apply a precise amount to connector pins without squeezing too much from a tube. It's particularly useful for trailer harness plugs and multi-pin electrical connectors where over-application fills the connector body.
Marketing copy from Mission Automotive, via Amazon. Not editorial.
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