Pour approximately 5.5 liters of clean water into a container and slowly add a 25 kg bag of Flow Grout Expansive while mixing. Carefully mix the blend for several minutes then remove any powder which has stuck to the sides and bottom of the container. Add more water to obtain the consistency required without exceeding the recommended amount, approximately 6-6.5 liters. Mix again for several minutes to form a well-blended, plastic consistency, lump-free mixture. Flow Grout Expansive remains workable for around 15 minutes at +10°C to +25°C.

Pour a constant flow of Flow Grout Expansive into the formwork from one side only, making sure that the air is expelled and make sure the formwork is well sealed to prevent any mortar leaking out. The formwork must not draw any of the mixing water from the Flow Grout Expansive and it is recommended to treat the formwork with a form-release product. There is no need to vibrate the mortar after pouring. Pieces of round bar may be used to help the mortar flow into more difficult areas. If areas thicker than 5 cm need to be repaired with Flow Grout Expansive and they are not confined, dolly bars must be placed in position before pouring the mortar so that the layer of mortar over them is at least 2-3 cm thick. Layers less than 5 cm thick may be poured without adding rebar, as long as the substrate has a surface roughness of at least 5 mm to contrast expansion phenomenon, which normally takes place within the first 24 hours. When applied as anchoring of metallic structures pour Flow Grout Expansive in a constant flow from one side only, making sure that the air is expelled from the area to be filled, which must be at least 2.5-3 times bigger than the diameter of the bar to be anchored. The mortar does not need to be vibrated after pouring. Use lengths of round iron bar to work the mortar into tight spaces.