Mission Automotive Silicone Dielectric Grease Paste — 8 oz Clear Waterproof Silicone for Electrical Connectors & Spark Plugs, Brus

Mission Automotive Silicone Dielectric Grease Paste is a clear, waterproof silicone grease designed to protect electrical connectors, spark plugs, and rubber components from corrosion and moisture.

This transparent to slightly milky silicone paste is formulated for long-lasting protection in automotive, marine, and electrical applications. Packaged in an 8 oz jar with an integrated brush in the lid, the grease spreads evenly for accurate coverage and helps prevent voltage leakage, oxidation, and water intrusion across a wide temperature range. It’s a multi-purpose maintenance product meant to extend component life and improve reliability in harsh conditions.

How does this grease protect electrical connectors and prevent corrosion?

The silicone forms a non-conductive barrier that seals out moisture, air, and contaminants, which are the main causes of corrosion and increased contact resistance. Because it’s non-electrically conductive, it reduces the risk of voltage leakage while preserving reliable connections.

• Creates a waterproof seal around terminals and plugs
• Prevents oxidation that raises resistance
• Non-conductive formulation avoids electrical shorts
• Stable across a broad temperature range for consistent protection

Can I use this on spark plugs, rubber gaskets and other vehicle parts?

Yes — this silicone paste is suitable for spark plug boots, rubber seals, weatherstripping, and similar parts. It helps ease installation and removal, reduces wear from friction, and preserves rubber elasticity without dissolving or degrading common elastomers.

• Coats spark plug boots to prevent arcing and seizing
• Lubricates brake caliper pins and sliding components for smoother operation
• Protects rubber gaskets and weatherstrips from drying and cracking
• Clear finish avoids visible residue or staining on components

How do I apply the grease for best results?

The jar includes an applicator brush in the lid to make precise, mess-free application simple. Apply a thin, even layer to mating surfaces or inside boots and connectors, then reassemble; avoid excess that could attract dirt in exposed areas.

• Use the lid brush for tight, controlled coverage
• Wipe excess with a clean rag to prevent debris build-up
• Reapply periodically for long-term protection in wet or salty environments
• Store the jar sealed to maintain product consistency

Is this grease durable in marine and extreme-weather conditions?

Formulated for durability, the silicone paste withstands moisture, salt spray, and wide temperature swings without washing away or hardening. That makes it a good choice for boats, off-road vehicles, and equipment exposed to harsh climates.

• Resists water washout and salt corrosion
• Remains stable from low to high operating temperatures
• Maintains a consistent, spreadable texture over time
• Helps protect electrical systems in wet or coastal environments

Who is this for: Mission Automotive Silicone Dielectric Grease Paste is intended for mechanics, DIY automotive enthusiasts, marine operators, and maintenance technicians who need a reliable, non-conductive lubricant and sealant. If you work on spark plugs, electrical connectors, rubber seals, or exposed terminals and want a waterproof, long-lasting protective paste with an easy applicator brush, this 8 oz jar provides practical coverage for workshop and field jobs.