This product is a high temperature sealing agent for anodizing aluminum alloy. The utility model is an ultra-fine and uniform powder composed of nickel salt, Ph regulator, accelerator, ash suppressant, etc. . It can be widely used in sealing anodized film, good sealing effect, smooth surface after sealing, can reduce dye color seepage, powder film, fog and other undesirable phenomena, easy filtration, long-term use.