WD-40
WD-40 is a multi-purpose lubricant and penetrating oil spray used for loosening stuck parts, rust removal, and general household maintenance.
Estimated value as of 2026
Fun Fact
WD-40 stands for 'Water Displacement, 40th formula' — it took 39 failed attempts before the engineers at Rocket Chemical Company perfected the formula in 1953.
Price History
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