AWS/ASME RB CuZn-D High strength joining of steels using both the thin flow and bead form techniques. Ultra high purity nickel silver alloy featuring "Safe Vue" moisture sealed flux coating • Unique "Safe Vue" flux coating eliminates harsh chemical odors and the bright orange visibility blocking glare of conventional sodium type flux coatings. • Slick, smooth moisture sealed flux has tripled the shelf life of similar products. • Flux cleansing action is exceptional on dirty steels and cast irons.