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#1
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Mixing different setting times of setting type joint compound
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). Thanks |
#2
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Mixing different setting times of setting type joint compound
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 |
#3
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Mixing different setting times of setting type joint compound
On Tue, 15 Nov 2011 20:14:14 -0500, 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). Thanks Apparently it works - but the hardening time is not linear with the mix - and you need to mix it well DRY before adding water. Don't try to "batch mix" it on the fly. |
#4
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Mixing different setting times of setting type joint compound
On Tue, 15 Nov 2011 17:32:55 -0800 (PST), RicodJour
wrote: On Nov 15, 8:14Â*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 Adding just a WEE bit of 20 minute will speed up the 90 quite a bit, from what I've been told |
#5
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Mixing different setting times of setting type joint compound
On Nov 15, 10:23*pm, wrote:
On Tue, 15 Nov 2011 17:32:55 -0800 (PST), RicodJour wrote: 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. *Adding just a WEE bit of 20 minute will *speed up the 90 quite a bit, from what I've been told The predictability of setting type compound is very important. Having compound kick too quickly means you'll end up throwing compound away and wasting money, and having it set too slowly can throw off your finishing schedule and cost you money and time. USG makes 5, 20, 45, 90 and 210 minute setting type compounds, and a bag of the stuff is cheap enough and doesn't go bad. Buy a bag of what you need if you don't have it, and save the ones you do have to use at an appropriate time. R |
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