Bad drywall plaster9/7/2023 ![]() If a joint compound product is exposed to bacteria, it will grow mold. The putty knife can sometimes carry bacteria on it, and that will cause mold to grow.Ī few drops of water should be all it takes to get the moisture you need and keep the compound good until the next time that you need it. If you do this, you do risk some mold growth inside the putty as it is closed. Try to make sure you add just a slight amount and don’t add it with a putty knife. Sometimes adding a little water to your compound will help to make sure that it does not dry out. Make sure that you get the top on as tightly as possible and then keep it in a temperature controlled environment so that it does not go bad. Once the container of joint compound is opened, it is hard to get it to seal the same way again.Įven though you will have the top on, air will continue to be able to get in the container. However, a can filled with dry joint compound will no longer be useful. Of course, this is a good thing when applying to walls as you will want the product to dry so that you can paint over it. Until that seal has been broken upon opening, there is no way for air to get to the joint compound.Īs soon as the compound is exposed to air, it can start to dry out. Joint compound comes in a container with a sealed top. Here are the most common things you will have to look out for. There are a few factors which can make joint compound go bad a bit faster. If you want to preserve it for a long period of time, you will have to make sure that you store your joint compound in the proper environment.įactors that Lead to Joint Compound Going Bad There are, however, a few different reasons that joint compound can go bad. Joint compound will go bad, but most of the time, it will take about four or five months for an open container to go bad. If you have an old container of joint compound, we have all the information you will need to determine if it is still good. However, there is a point when you will have to evaluate whether or not your joint compound is still good. With joint compound, there are certain environmental conditions that will keep this useful product good for quite some time. Drywall joint compound is a beneficial substance that can finish off and complete a wall. ![]()
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