Paste Flux 16Oz Regular All purpose, soft soldering paste flux ideal for use with 95/5 and other common solders such as 60/40, 50/50, and 40/60. Can be used on all solderable metals including copper, tin, zinc, nickel, and sheet lead. Do not use on stainless steel, aluminum, or magnesium. Not recommended for electronic use. When heated, it reduces surface tension and allows the solder to flow easily and uniformly into the joint. Flows smoothly into even the smallest cavity. Cleans and fluxes in one operation. Smooth consistency makes it easy to apply. Lead free and acid free - safe to use on potable water systems. Special oil base protects the solder joint against corrosion. Low scorching and low spattering. Meets: OF 506 Type 1 A, MIL - F - 4995, and MIL - F S -6872A.6872A.