I'm not sure what it is but it's been around for a very long time. I have used it in my RamSets for more than 40 years. It's sold under a lot of different brand names. Paslode (RamSet), Hilti, Simpson, Remington and DuoFast to name a few. If it's any relation to CLP then more than likely CLP is it rather than the other way around. It does work great in firearms as well. Much less expensive than gun oil.