Solder Flux, Hot Weather, 16 oz Container, Jar Container, Paste Form, Composition: (10 to 25)% Zinc Chloride, (10 to 25)% Ammonium Chloride, (70 to 90%) Petrolatum, Tan/Gold to Black, Petroleum Odor, Flash Point >204 Deg C, Specific Gravity 1.06, VOC 0 g/L, Standards: OF 506 Type 1 A & A-A-51145, MIL - F - 4995, MIL - F S - 6872A, Nokorode® Hot Weather Flux can be Used With 95/5, 60/40, 50/50 and 40/60 Solders. It can be used on all Solderable Metals Including Copper, Tin, Zinc, Nickel and Sheet Lead