Q:  Can I put a hot pot directly onto a cast concrete coutertop?

Concrete is very heat resistant but can be subject to thermal shock if a red-hot object is placed directly upon it.  Like granite, the exposed area may flake or chip away if too much heat is applied and the sealer may lose it"s effectiveness.  We recommend using trivets for hot cookware.  If you desire, cast-in rails can be incorporated for just such a function.   LinkClick.aspx