As the thin solvents dissipate into the atmosphere, they leave behind the thicker oils and waxes that do the actual lubricating work. This is particularly true if the lubricant is exposed to dust, dirt, or high levels of humidity.
Does WD-40 Evaporate Completely: Understanding the Process
However, the magic that makes WD-40 easy to apply lies in the addition of volatile solvents. Their primary job is to carry the heavier lubricating oils into the tiny crevices of a mechanism, such as the threads of a rusted screw.
In a warm, dry, and well-ventilated area, the solvents will evaporate in minutes. Understanding the Volatile Components To grasp why WD-40 evaporates, you must look at its composition.
Does WD-40 Evaporate Completely: Understanding the Solvent Dissipation
The Role of Evaporation These volatile solvents are engineered to evaporate quickly when exposed to air. When you spray WD-40, you are primarily applying a mixture of these fast-acting solvents and the slower-working oils.
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