How a waterproof mascara is formulated is also crucial. Curious about how waterproof mascara ingredients differ from regular options, I asked Petrillo to break it down.
Water-resistant polymers: According to Petrillo, waterproof mascaras contain specific water-resistant polymers that aren’t found in non-waterproof tubes. “These polymers create a protective barrier around the lashes, preventing water from causing the mascara to smudge or run,” he explains. Examples: Hydrophobic polymers like acrylates copolymer, styrene/acrylates copolymer, or polyurethane-35
Wax or oil base: “Waterproof mascaras often have a higher concentration of waxes or oils than regular mascaras,” Petrillo notes. “This helps the mascara adhere better to the lashes and provides additional water repellency.” Examples: Beeswax or carnauba wax
Silicone derivatives: Certain waterproof mascaras will also include silicone derivatives, which further increase their water resistance by creating a flexible film on the lashes. Example: Dimethicone
Film-forming agents: Petrillo shares that these agents are more prevalent in waterproof mascaras. Once the mascara dries, he says, it forms a thin, waterproof film, ensuring it stays in place even when exposed to water or humidity. Example: Isododecane
Erin Jahns
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