C40B4 (K1-40) is a conventional cationic bitumen emulsion which complies with grade K1-40 of BS 434-1 and grade C40B4 of BS EN 13808. It has been designed as a tack coat for use in the construction and repair of pavements, driveways, roads and highways.
C40B4 is a rapid setting emulsion, primarily designed to provide an adhesive bond between existing surfaces and bituminous overlays e.g hot rolled asphalt, macadam and slurry seals, or between courses in road construction.