Length - 01:12 When chalking out a decorative concrete job in preparation for saw cutting or coloring concrete, you need to be aware of the color and type of chalk you use. This is important because many of the red or blue chalks typically used contain a large amount of iron oxide that will stain the surface of the concrete and show through on the beautiful, decorative floor. It is best to use an orange chalk that is heavy in talc. This is often referred to as talcum powder and wipes cleanly away without staining. Find a Concrete Contractor 23 Services in 200 Metros -- U.S. and Canada © 2008 ConcreteNetwork.com None of this site may be reproduced without written permission |