Tef-Gel is primarily used to prevent corrosion when dissimilar metals are fastened together. For example, you fasten down a stainless steel sail track slide to the metal deck of a boat; you use this product to prevent dissimilar metal electrolytic corrosion. This product also stops rotating objects from seizing and prevents galling in stainless steel screw fasteners. It also protects electrical terminals/connectors. Brilliant! Please take some time to watch the below videos to see how fantastic this product really is, and how easy it is to apply.