Interpretation of dream: Plaster

To work with plaster in your dream, suggests that there is some matter that you are trying to resolve or settle. To dream that you are making a plaster mold, indicates that you are stuck with living in the past. You are unwilling to change and evolve with the times.

More interpretations:
Plaster (Miller): To dream of seeing walls plainly plastered, denotes that success will come, but ...