He doesn't mean the stuff you use to seal windows. That is silicone caulk. He is referring to silicone lubricant, it comes in a similar tube, but the tube is cardboard and it usually slightly smaller in diameter. You should be able to find it at a hardware store or Home Depot

Thankfully, my father in law is a plumber. The copper is rated around 1500PSI plus, and there is some dwv copper, but it is actually somewhat difficult to come by because it has been mostly phased out since the advent of cheap abs.

I know it tends to cost more than pvc, but considering that I already have the chamber and barrel material, the T is relatively inexpensive (around $20). The biggest reason I am going to use copper is because it isn't going to be only me using it. It is going to be used at my parents speedway and I'...

Hello all, First post here, but I have already built a few cannons. All the cannons I have built have been sprinkler valve controlled. I am now building a t-shirt cannon that I need to be extremely portable and 100% safe. I have quite the wood shop, so tools are very easy to come by to construct my ...