We are in the process of analyzing an existing filigree slab. On the exisiting design drawings there is a note point to the top layer with the designation S.H. CONCRETE. Does this mean anything to anyone? The drawings are from the late '70s.
You have read the specifications pretty carefully because there are a wide variety of surface applied hardeners ranging from liquid to dry shake-ons. The costs vary widely too. Dry shake-ons like Master Plate can get very expensive for both material and labor, but have their specialty uses.