The Origin and Naming of WD-40

This chapter discusses the origin and naming of WD-40, a water displacement chemical originally created to treat the sides of ICBMs. It explains that the rocket chemical company, a subcontractor for the US military, came up with the formula on their 40th attempt and named it WD-40. The chapter also mentions the possibility of WD-40 being reformulated over time and jokes about using WD-41 or WD-42.