To see mold in your dream indicates that something in your life has been ignored or is no longer of any use. It may also refer to the negative emotions that are expanding and growing in your subconscious. You need to find a productive way to express them before it grows out of control. Alternatively, the mold may also represent transformation. If you dream that you are scrubbing mold, then it means that you need to rid yourself of the negative and pessimistic attitude.
If there is mold growing on your food, then it implies that you are too easily susceptible to some negative energy around you.
To see a clay or plastic mold in your dream implies that you are lacking creativity. Perhaps you are too rigid in your thinking. If the mold is broken, then it suggests that you need to break away from your old habits and explore new ideas. In particular, dreaming of a mold of a key means a lack of privacy in some area of your life. You feel exposed.