On Thu, 30 Jan 2020 13:00:58 -0600, Fox's Mercantile
wrote:

On 1/30/20 11:16 AM, Klay Anderson wrote:
So--I've a tap and die set for plastic pipe (think sprinkler
system). Any ideas for the best lube for threading same? Dry alone snaps the pipe. I think petroleum products will attack
the plastic. Silicone?

K-Y Jelly.
Water based lubricant.
Yeah, K-Y is good for screwing. Sorry. I couldn't help myself.
Eric