Be sure to polish the welded part clean and flat before use.Drop it when it is just dissolved, and it must be fixed well. It is recommended to fix it for about 5 minutes. After the welding wire is cooled, let it stand for half an hour.The first time you use it, you can find the bottom surface of a stainless steel basin, weld it, and try it. How to use: Use a windproof lighter or a welding torch to heat the welding rod and rub it on it.Material: tin powder, aluminum powder, sulphur powder, flux.