Our experts, use different chemicals to prepare an expansion. It is prepared according to the temperature, but due to changes in temperatures, expansion joint leaves the place, and cracks appears.In this situation fast reparation is needed, in this work, by the help of our experienced experts, these cracks can be stopped by expansion and provides protection for a long time. In which with the help of including flexible sealant or concrete sealant, chemical items it can be maken fine.