Or moly disulphide for that matter?
I searched this sub-forum for "graphite sprue plate" without the quotes and the dry lube options are mentioned or recommended by very few.
Right now I am using a 100-weight automotive AC oil (might be PAG, but it's cold out there and I'm lazy right now) which works great but for only about the first 75 pours.
And I don't particularly like the prospect of unscrewing the sprue plate to put more on in the middle of a casting session. That's how long the peak performance of the AC oil lasts, but I can manage up to another 75 pours most of the time by rubbing the lead streaks off once in a while.
Wondering if either of the dry powder lubes would work better.
Thanks!