I just found out that Petit makes their own version of VC 17. It is called SR-21. A guy in my yard just put some on and it certainly seems to be the same product. The copper powder and the very thin consistency. The nice thing is that it lists for $15 a can less than VC. I just found a place in Buffalo, NY that was closing out their stock for $17 a can. Unfortunately they only had two left which I took. The guy at the shop said that even though it is considerably cheaper than Interlux, he can't sell it. Everyone wants Interlux. Anyone know anything about the Petit version?