A grout float is a rectangular-shaped tool with a handle that is designed for filling joints between tiles with grout. It has a rubber bottom and a handle on top. Grout floats that have soft foam rubber bottoms work well for grouting with cement-based grouts such as MAPEI’s Keracolor S and MAPEI’s Keracolor U. Grout floats that have hard firm rubber bottoms are best for grouting with premixed grouts such as MAPEI Flexcolor CQ.
