Since a waterproof mascara is completely free of water, special substances such as polyethylene, resins and carnauba wax are added to its composition. They allow the mascara to last longer and resist water. Precisely by virtue of its formulation, waterproof mascara is very heavy and, therefore, it is not suitable for daily use. Plus, being more difficult to remove, it requires more rubbing which, in the long run, can damage the eyelashes and make them more fragile.