Grande Cosmetics GrandePrimer Pre-Mascara Lengthener and Thickener For lashes that still seem thin even with mascara on, this water-resistant Grande Cosmetics GrandePrimer Pre-Mascara Lengthener and Thickener ($25) adds mini-fibres, peptides, and a natural wax blend to coat and separate so mascara can grip on and help lashes look longer and fuller. Image Source: sephora.com Grande Cosmetics GrandePrimer Pre-Mascara Lengthener and Thickener $25 from sephora.com Buy Now