The surface must be stable and free of separating substances.Insufficiently firm layers and concrete slurry must be removed. For this purpose the surface may be prepared by suitable mechanical processes such as e.g. shot blasting, milling or any other suitable mechanical means. Blow the cracks and treated surface with oil free air to ensure complete removal of all dust and loose particles. In the presence of running water the flow must be stopped using Polyinject Stop which produces a rapid setting water-stopping foam. When the water is stopped the cracks are re-injected with Polyinject Rubber.

Polyinject Rubber is be applied as injection resin using injection packers and 2-C pumps equipped with a flushing unit. The injection packers may be fixed into holes drilled directly into the crack or drilled diagonally from concrete adjacent to the crack or by the fixing of injection nipples. For further assistance and instructions regarding the packer fixing and design please refer to our method Statement. 

Polyinject Rubber consists of 3 components. The all container is poured completely into the A1 container and mixed for approx. 3 minutes. The B component is filled in the desired amount into a container equivalent to the A1 component and filled with clean tap water up to the same mass as A1 + A11, then it is mixed again for 3 minutes. The A and B components prepared in this way are ready for use and are processed 1:1 with a 2-component injection pump equipped with a flushing unit. The use of the injection pumps that feature forced conveyance of 1:1 (A to B component) is recommended in order to prevent mixing errors. The A1 component activated with AII can be used for approx. 24 hours (depending on temperature). Using the activated A1 component is not recommended after this period. The ready-for-use B component remains stable for approx. 5 hours (depending on temperature). The required potlife can be defined depending on the amount of B component (salt) and the temperature. The amount of component B should never be below 40 g (based on 20 kg of A1 component) to assure a reliable reaction. Likewise should the amount of component B not exceed 1000 g (based on 20 kg of A1 component) to avoid degradation of the product properties. The amount of component B shall never exceed 300 g (based on 20 kg of A1 component) in case of crack injection on reinforced concrete. Never mix the A1+A11 mixture together with B component.