Abstract: A granulate for introducing a fibrous filler material into a liquid bitumen mass by adding said granulate to said liquid bitumen mass is provided, said granulate comprising: fibers of said fibrous filler material, said fibers coated and agglomerated into granulates by a binding agent, said binding agent initially binding said fibers when introduced into said bitumen and thereafter losing its binding effect in said liquid bitumen when exposed to heat or the presence of a solvent incorporated in the liquid bitumen thereby effectuating a complete dissolution of said granulate and homogeneous distribution of said fibers throughout said liquid bitumen mass.