30 grit metal one bar, on our lavina grinders. Some time we cast down some play sand if it still got a lot moisture in it.

Best Regards,
Randy Frye, CEI Surface Pros
www.ceisurfacepros.com
239-253-1991

> On Jun 20, 2015, at 2:27 PM, Mark Winslow <midwesttileandstonemedic@gmail.com> wrote:
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> What is the best thing to remove mastic from a concrete floor?
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