Is lubricant like WD-40 a good contact cleaner?

Generally, contact cleaners contain 100% solvent, which dissolves grease, carbon deposits, and other contamination, and allows it to run off. The solvent then evaporates, leaving a clean, conductive surface behind. Aerosol lubricants, like WD-40, have some cleaning ability, since the oil in the can has to be dissolved in a solvent. In this case, the solvent dissolves the contamination and a light oil is left behind. This oil can provide lubrication, allowing a connector to be inserted easily. It can also provide some hydrophobicity, preventing moisture from collecting in the connector and either causing a short circuit or corrosion. Chemtronics offers DPL (Deep Penetrating Lubricant) and CircuitWorks Gold Guard Pen for this type of application. One problem with adding oil to a connector is it can collect dust and other contamination from the air around it.

WD-40 Specialist 11 oz. Contact Cleaner

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Electrical Contact Cleaner Lubricant

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WD-40® Specialist® Contact Cleaner - Case of (6) 11 oz Cans

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You can use the 1 Gal. WD-40 Multi-Use Product for soaking and dipping your tools to get the most out of the product. WD-40 Multi-Use Product protects metal from rust and corrosion, penetrates stuck parts, displaces moisture and lubricates almost anything. The WD-40 Multi-Use Product is truly a toolkit in a can with its permanently attached Smart Straw that Sprays 2 Ways. With more than 2,000 documented uses, it has been the go-to resource to get the job done for more than 68-years.

WD 40 Multi-Use Product - 12 oz

Electrical Contact Cleaner