Estocell Bitumen Impregnated Fibre Board Description Estocell is a compressible, bitumen impregnated breboard, supplied in sheet form. It is used to form and ll expansion joints between in-situ and precast concrete construction. Uses Estocell is a compressible joint ller suitable for forming joints between in-situ and pre-cast concrete components. It is used to form structural expansion and separation joints in: Concrete roads, ramps and runways Bridges and pedestrian areas Concrete pavements and floors Building basement structure and subways Concrete retaining walls Advantages Simple and easy to handle and install Will not extrude under compression Resilient Economical