I have a couple windows where there is a space below the window that goes into the wall (see bottom of picture). There was mold and condensation all around the area, so I'm guessing there's mold down in there as well. Is there something I can put in there to kill/prevent mold before sealing that space?
Solution to put down a window sill crack to prevent mold
condensationmoldsealingwindows
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Best Answer
I like 3% hydrogen peroxide to kill mold. It doesn’t stink like bleach and won’t be a problem to seal over once dry.