With the help of a special saw open joints along the wall every 40cm, in a direction parallel to the ground (the boring is done with saw which is bearing two diamond discs). Each end of the opening of the joints should be at least 50cm either side of the crack. For rods 8mm the width of the opening must be 1,2cm and 3cm depth for the installation of a single bar. For bars 6mm the width of the opening must be 1cm and 5cm depth for the installation of two bars.
Clean the open joints with water to remove the dust and wait a while to dry (also can use compressed air for cleaning).
Mix the cement-epoxy resin of StatiCAL R30N or StatiCal Historic L with mixer at low speed in a vessel, until the mixture obtains a homogeneous surface. Fill the joints with the resin covering half of it by using a pistol and place the bars in the depth of the joints pushing with a thin spatula.
Add again resin StatiCAL R30N or StatiCal Historic L with a trowel to cover the bars leaving 3mm gap for filling the joints with plaster or another final coating.