The main ingredient in Wurth Rost Off Extra is PTFE. This versatile plastic was invented in 1938, and is more commonly called by its Dupont brand name Teflon, though many companies have variations of PTFE. Among its many properties, PTFE is incredibly durable, does not age, resists water, has low friction, and is slippery. All of these things make it the perfect lubricant for rusted screws, nuts, hinges, and any other corroded hardware.
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