Extreme heat can cause makeup products to separate, melt, dry out, or lose pigmentation. High temperatures affect the stability of ingredients, leading to changes in texture and performance, making them less effective and difficult to apply, as well as affecting the product’s safety.

Key ingredients such as waxes, oils, and preservatives in makeup are particularly vulnerable to heat, leading to changes in texture and effectiveness.

Opting for waterproof formulas and cream or gel products can reduce the risk of melting and crumbling in hot conditions.

Look out for visual indicators like separation and clumping, and performance changes such as reduced pigmentation or application difficulty to identify if makeup has been damaged.

The best approach to keeping one’s makeup safe is to not store it in a hot car or any other hot environment.