Instructions on the package, nobody showed me how either. From what I recall, there's a tool with a spiral-edged metal spike and and a second one with a large eyelet. You use that to rough up the puncture, then coat the second tool with a lot of the adhesive and use it again on the puncture. Finally, you insert the plug in the puncture with the tool & manipulate it until the plug comes off the tool. Wait for a bit, then add air to the tire. I haven't done one in over a decade, so it might have improved.