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Joint compound needs air to grow mold. So before you are putting lid on, flatten the compound surface level and then add a couple inches of water, then put on lid. Also if you have mold in your compound just throw it away. Would you want moldy materials put in your house?


5

Mold grows on any surface that provides food for growth. Joint compound contains organic compounds and lots of moisture. The compound will only last a finite length of time even under "ideal" conditions (if mold spores don't ruin it drying-out will). To slow down its' expiration time: when storing the compound for any length of time, place the plastic ...


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Mix in a bit of chlorine bleach. It won't affect the compound and the odor dissipates fairly quickly upon use.



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