In this episode Ben shows how to use silicone to make reusable mold for casting concrete. This is an easy process for making a concrete copy of an existing object. I used Mold Star 30 silicone rubber ...

CONCORD, N.H. — What's the difference between cement and concrete? In my case, about $9, 55 pounds and a slightly sore back. Though the two terms are often used interchangeably, cement is an ...