Inside of the pipe is coated with a two-part polyurethane or polyurea mixture that consists of a resin and a curing agent. The material is mixed with a help of a rotating spray head that will create a durable coating inside the pipe. A powerfull pipe coating system is needed for spinning the spray head, so that the centrifugal force will throw the material to the surface of the pipe. Sprayd-in-place pipe method will compleately coat the inside diameters of sewer and drain pipes including straight runs and around bends and elbows.