Finish the following sentence with the best choice: How do I ensure the mold is sealed when making a concrete countertop?

Choices:
- You'll need to properly seal the mold using a screwdriver. You want the caulk to have extra clean edges.
- You'll need to properly seal the mold using silicone caulk. You want the caulk to have extra clean edges.

Answer:
You'll need to properly seal the mold using silicone caulk. You want the caulk to have extra clean edges.