Precast concrete (Reusable mould made of polyurethane elastomer) is a construction product which is made by pouring concrete in a reusable mould or "form", is then treated in a controlled environment, is subjected to a quality control and then transported to the construction and rised to its final destination. Precast concrete is used in a variety of projects, from landscape architecture for houses,going through all kinds of projects to huge scale constructions and construction of bridges. The moulds used to create precast structures can be reused..The money invested in the preparation of concrete may be an important part of the cost of the entire project.