Method of Application
Fill the joints completely with mortar using the appropriate rubber trowel, making sure the joints are completely compacted. Remove excess mortar on the surface by moving the float diagonally across joints.
When the mixture loses its plasticity and becomes matt, usually after 10-20 minutes, clean the surface wtih a damp sponge working diagonally to the joints. If cleaning is carried out when the mixture is still plastic, the grout may be dragged from the joint leading to color variations.
Any residue left can be cleaned from the surface with a clean dry cloth.