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I usually use gb 464 with fantastic results. Well' date=' my supplier ran out and I subbed for 444. The hot and cold throw are almost identical, but I get terrible sinkholes when I pour 444 that I never got with 464. I am heating to 180 adding FO and pouring anywhere from 140-150, which is what I pour 464 at. Any ideas?[/quote']

I use 444 and it's recommend pour temp is 130-140 and I don't get sink holes at that temp (130 works well for my home conditions). You might try this and see if it helps.

Kathy F

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