I found that if you pack the receptacle side you will get a few plug and unplugs out of it before you need to squirt a little more in. It will go a long way. I use this stuff on pretty much any kind of electrical plug. I have used it on VHF antenna cables to canon plugs used on radar systems. West Marine sells one but I have found cheaper versions at auto parts stores that are just as effective cause you know when the word Marine gets put in front its good reason to double the price. What your looking for is a Dielectric grease to prevent corrosion and moisture caused arcing. Spending a lttle on this could prevent major arcing in the future and possibly your boat.