The Role of Propellants in Aerosol Cans While the liquid itself is not flammable, the method of delivery for WD-40 is crucial to its safety profile. This oil is highly refined and has a very high flash point, well above 100 degrees Fahrenheit, which classifies it as combustible rather than flammable in its pure, stable state.
WD-40 Flammable Or Combustible Truth: Understanding the Real Fire Risk
The key factor lies in application. Its distinctive blue can and straw applicator are instantly recognizable, and it is often used for everything from silencing squeaky hinges to freeing stuck bolts.
This vaporization creates a combustible mixture in the air that can ignite, resulting in a flash fire. Therefore, the direct answer to the simple question is no, WD-40 in its container is not considered a flammable liquid.
WD-40 Flammable Or Combustible Truth: Understanding the Real Fire Risk
Consequently, using WD-40 on a hot engine is strongly discouraged and creates a significant fire risk, making it appear flammable in that specific scenario. In reality, the formulation is a precise balance of ingredients designed to be stable and safe for general purpose use.
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