[header] How to make thermite [title] Select your site carefully. [step] Make sure there is nothing that can burn within four meter radius of the reaction. Check that metals with low melting points, such as lead, tin, cadmium, or zinc, aren't near your four meter radius. 
[title] Wear a welding mask for complete protection, but wear sunglasses at the very least. [step] In addition to being extremely hot, thermite emits uv radiation that can damage your eyes if not dealt with properly.