Buxom Buxom Lash Waterproof Mascara, Blackest Black A volumizing, waterproof mascara that separates and defines lashes. Glide on amped-up lashes with this ultradefining, smudge-proof mascara. The vitamin-enriched, clump-resistant formula deepens, darkens, and intensely thickens, while the curvy, hourglass-shaped brush evenly coats lashes-separating and defining-from root to tip.