It is necessary to remove all the corrosive phenomena from the concrete base and from all the reinforcement steel (e.g. by sandblasting).
If Profscreen LC2.5 is used as an adhesive compound, the substrate must be stiff, clean, and capable of bearing the load. Particularly dense and smooth substrates that are not capable of bearing the load of the layers (e.g., dirt, old coatings, vapor protective layers, water-repellent materials, or cement grout) as well as damaged concrete surfaces must be pre-treated with suitable mechanical means or by means of high-pressure water jetting. The pre-treated substrate must be dampened for, at least, 3 hours before the application of the materials. The surface must be damp, but it is necessary to avoid creating puddles.
In order to prepare the mortar, the contents of the bag must be poured into a tank with clean water at a rate of 5-5.6 liters of water per 20-kg bag while constantly mixing until a homogeneous mass is obtained. The mortar must be mixed with the use of an industrial-grade mixer. The use of gravity-type mixers for mixing as well as manual mixing are not recommended. The entire bag with the material must be used for mixing. The mortar must be set aside to cure for 3-5 minutes and then re-mixed. Then, the mortar is ready for use. The mortar must be used within 60 minutes from the moment of pre-mixing with water. In case of increased viscosity of the mortar in the tank (within the life time of the mortar), it is necessary to remix the mortar without adding water. Do not exceed the required value for the volume of water!!! Only clean capacities, tools, and water must be used for the preparation of the mortar.
The substrate and ambient temperatures during processing and over the next 12 hours must be between +5 °C and +35 °C.
As anti-corrosion protection of reinforcement
Apply the mixed material with a soft brush to the entire area of the prepared reinforcement steel. The layer thickness must be, at least, 1 mm (with the consumption of, approximately, 1.4 kg / m2). If the first layer dries to a slightly moist state (after about 40-50 minutes), apply a second dense layer. Before applying the concrete repair mortar, the material hardens within, approximately, 2 hours (at the temperature of +20 °C). Upon subsequent application with the use of mechanical spraying, the coating must completely cure within 8 hours (at 20 °C).
As an adhesive layer
Apply the mixed material with the use of a stiff brush to the prepared damp substrate (approximate consumption: 2-3 kg / m2). Subsequent application of fresh repair material is implemented according to the “wet-to-wet” rule. Under any circumstances, it is necessary to prevent the adhesive compound from drying up. In case of drying of Profscreen LC2.5 material, it is necessary to apply a second layer on top of the one that has dried up. Setting and curing times are highly dependent on environmental conditions.
Curing time is highly dependent on environmental conditions. The non-cured material must be protected from exposure to water.