Corrosion Block is good for powerheads and electrical stuff on a regular basis , its relatively light and needs to be replenished every few months . Corrosion X is similarly light , and is used in the aircraft industry to preserve aluminum airframes . Boeshield, Corrosion X Heavy duty, and CRC heavy duty corrosion inhibitor as well as the Honda product are much heavier product and spray as a liquid and thicken or congeal to a very persistent waxy film . Good for trailer protection and battery terminals and such . Also available is molybdenum grease in aerosol as well as really thick but penetrating wire rope lubricants in spray form .Lots of products I have not mentioned . We dont even use WD 40 for fishing,much less anything else . It is a very temporary product , more like a very light oil or solvent [ PB Blaster is way better] as C-Gypsy and Colobear pointed out . However I think it is derived from Bananas . Thats what it smells like to me......
Marc