CRC Dielectric Grease 3.3 oz Opaque White — Non‑Conductive Silicone Gel, High‑Temp Protection for Electrical Connectors

CRC Dielectric Grease is a non-conductive, silicone-based 3.3 oz gel that protects and lubricates electrical connectors against moisture, corrosion, and heat.

Designed for automotive, marine, and household electrical connections, this CRC dielectric grease forms a waterproof barrier that helps preserve contact integrity and ease future service. Its opaque white gel spreads easily for precise application on spark plug boots, terminals, sockets, and other connectors without conducting electricity. The formula withstands high temperatures up to 204.4°C and resists breakdown in demanding environments, making it a practical choice for technicians, hobbyists, and DIYers who want reliable protection for sensitive electrical components.

How does CRC Dielectric Grease protect electrical connections?

The grease displaces moisture and seals gaps around connectors to prevent corrosion and oxidation that degrade contact performance over time. Because it is non-conductive, it won’t cause shorts while still protecting against arcing in high-voltage boots and terminals.

• Forms a waterproof barrier on connectors and boots
• Prevents oxidation and corrosion at contact points
• Reduces arcing risk in spark plug boots by insulating surfaces
• Maintains stable contact under vibration and environmental exposure

Where should I apply this grease in a vehicle or boat?

Use CRC dielectric grease on exposed electrical terminals, spark plug boots, distributor caps, battery post connections, and marine connectors to extend life and reliability. Apply sparingly to mating surfaces and around wire seals—do not coat internal switch contacts where conductive grease is required.

• Spark plug boots and ignition wires
• Battery terminals and cable ends (outside mating faces)
• External sensors, splices, and weatherproof connectors
• Trailer connectors and marine plug housings

How do I apply CRC Dielectric Grease for best results?

Clean the contact surfaces of dirt and corrosion before applying a thin layer of the opaque white gel. Squeeze a small amount from the 3.3 oz bottle, work it into the rubber boot or around the terminal, and reassemble; excess can be wiped away with a cloth.

• Wipe contacts clean and dry before application
• Use a light coating—thin films are effective
• Reapply during routine maintenance or if sealing is compromised
• Store upright with cap sealed to prevent contamination

Is CRC Dielectric Grease safe for electronic components?

The silicone-based formula is non-conductive and safe for most sensitive electronics when used as directed on external connectors and housings. Avoid applying inside potentiometers, switches, or other moving electrical contacts that require conductive lubrication.

• Non-conductive and silicone-based for safe insulation
• Stable at temperatures up to 204.4°C for heat-exposed parts
• Opaque gel allows precise placement without run-off
• Not intended for internal switch contacts that need conductive grease

Who is this for? CRC Dielectric Grease in the 3.3 oz bottle is intended for mechanics, marine technicians, electricians, and home DIY enthusiasts who need a reliable, easy-to-use product to protect external electrical connections from moisture, corrosion, and heat. It’s compact enough for toolboxes and service carts yet robust enough for professional use, offering long-term protection where weather and vibration threaten connector performance.