Thermal Fusing PowderIt's a mixed product.ItBy controlling the particle size and oxidation rate of copper oxide, adjust the heat release reaction of the flux and the temperature of the metal liquid after reaction, fully utilizing the heat release reaction to make the weldment joint a molecular structure.zuiUltimately obtainedWeldReceivedFor a copper typeWeldReceivedDotWeldingOutWeldReceivedDot is a molecular bonding that does not age, does notReceivedEffects of Corrosive Products; Suitable forWeldReceivedCopper, copper alloys, copper-clad steel, copper rails, cast iron, and various alloy steels including stainless steel and high-resistance heating materials..GuaranteeWeldingReceivedQuality.Soldering flux powder, a gray powder substance, commonly available in specifications such as:#90, #115, 150, 200, 250, and 300 heat release fluxes. The number indicates the grams per package. One package of heat release flux is paired with one package of primer and one metal separator. The primer and metal separator are prone to loss at job sites, as the number of each is fixed per primer kit. Therefore, proper storage is essential.