RELTON REL SAW SEMI SYNTHETIC BAND SAW FLUID CONCENTRATE 1 GALLON CONCENTRATE 15-20 PARTS DILUTION! For use in Band Saw Circulating Systems. Dilute 1 part concentrate to 20 parts water for Carbon Steels, Malleable Iron, cast Iron Dilute 1 part concentrate to 15 parts water for Tool Steel, Stainless, Brass, Copper, Aluminum & High Speed Alloys