Merkrete ProGrout is a fast setting, polymer modified, color consistent and efflorescence free grout, specifically formulated for grouting all types of ceramic and stone tiles on walls and floors with grout joint widths of 1/16’’ and up to 1/2’’ wide.   Suitable for both horizontal and vertical surfaces on residential and commercial projects, it only requires the addition of water.  ProGrout exceeds ANSI A-118.6 for latex modified Portland cement