ECHNIQUE CARE CRP-INDICATOR: CLEAN DISCRIPTION DULON BILGE CLEAN 34 is a strong multifunctional degreasant, developed especially for cleaning and degreasing the engine or motor (compartment). The product is safe in use, biologically degradable and removes substances like oil, grease and lubricants in an effective way. MANUAL Apply DULON BILGE CLEAN 34 to the dirty surface and allow briefly to take effect before rinsing off with water or wiping off with a dry cloth or tissue.