On Nov 15, 8:14*pm, blueman wrote:

Can I get an intermediate setting time by mixing say 20-minute and
90-minute setting joint compound?
i.e. will I get a uniform intermediate setting time (assuming I mix it
well) or will some set fast and other set slower.

(Note: I know that with West Systems epoxy you can mix different
hardeners to get intermediate curing times but not sure if this works
for joint compound).

Nope. It doesn't work that way. Whichever kicks first will kick
first and the compound won't work well after that.

The do make a 45 minute compound, though.

R