Finish the following sentence with the best choice: Once you have put melted HDPE plastic in a mold what should you do next?

Choices:
- Since the plastic will shrink as it cools be sure to clamp the mold and adjust the tightness every 5 mins.
- Once the plastic has cooled sufficiently wrap a heavy duty rubber band around the mold for at least 5 mins.

Answer:
Since the plastic will shrink as it cools be sure to clamp the mold and adjust the tightness every 5 mins.