If a joint is sealed it wont get penetrated no matter what it is. Penetrant is mostly for working things loose. It can help a lot of problems, connections actually seized or friction welded, galled together it doesn't do a thing for. It is about the perfect juice for nut and bolt assembly, we don't use it due to the cost and risk to the cans. Some of the super lubes are similar, farm store had one that went away but I liked that, I have finally got used to liq wrench penetrating oil. They finally did reformulate if from the original which was good as a solvent but just seemed to lack oil for outright lubrication.
We can see in some of the tests reported here atf and all there is a little difference here and there but in the real workd its,, where is a spray can and I aint gonna spring 12$ a pop for what 3 will do and have hard enough keeping it in stock as it is.