DeoxIT D100L D-Series, 7.4 Milliliter, Electrical Contact Cleaner, Brush Applicator, 100% Solution, Fast Acting Deoxidizing Solution That Cleans, Protects, Lubricates & Improves Conductivity On All Metal Connectors & Contacts, Use As A General Treatment For Connectors, Contacts & Other Metal Surfaces & On Non-Critical Metal Surfaces With Severe Oxidation & Corrosion.