It does not say water proof on it. This is what it says:
Bold, intense volume needs the biggest brush ever from Cover Girl, for a blast of lush, volumized lashes! Lashblast 24hr gives you bold, look at me lashes that will keep you getting noticed for 24 hours * Ophthalmologist Tested * Suitable for Sensitive Eyes * Suitable for Contact Wearers * Hypoallergenic * Removes easily with CG Clean Makeup Remover