Heat isn’t just inconvenient — it destroys makeup formulas. Oils separate, waxes melt, and active ingredients degrade.
Here’s what’s happening:
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Lipsticks & balms: Oils and waxes melt at ~85°F, causing texture changes and uneven application.
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Foundations: Heat causes separation and oxidation, leading to patchy, discolored formulas.
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Sunscreen & skincare: Active ingredients degrade, reducing effectiveness by up to 40%.
Even a short time in a hot car or sunny window can change how your products perform — and in some cases, make them unsafe to use.
How to prevent it:
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Keep products below 77°F whenever possible.
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Use insulated storage when traveling or commuting.
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Never store makeup in a glove compartment or trunk.
Understanding the science helps you protect your investment — and your skin.