The F804 building entry seal is intended for sealing piping in drilled holes in concrete walls/floors. This sealing variant does not require any concrete casting. The F804 provides so-called movement friendly sealing which allows for axial movement of the pipe. The seal is adjustable and can be mounted both inside or outside the concrete wall.

The F804 can be used with all sorts of piping, e.g. plastic, steel, concrete etc. and allows for generous axial movement of piping with a smooth surface. The special profile of the rubber sealing ring creates an efficient seal between the pipe and the concrete. A cavity in the rubber ring is filled with grease in order to achieve a movement friendly seal. At the same time the grease prevents any water leaking through the seal where the piping may be scratched. The pressure of the clamping ring causes the seal to expand while simultaneously causing the pressure against the wall/floor to increase forcing the grease out from the sealing groove.