Get thicker, fuller, more beautiful lashes and more with Rimmel Lash Accelerator Serum. This versatile dual-formula treatment from Rimmel is a real eye-opener! Rimmel features a wealth of beauty products, from foundations and concealers to treatments. Rimmel lash serum is a conditioning and fortifying gel that can be used on eyelashes and eyebrows. The ophthalmologist and dermatologist-tested formula works around the clock, promoting healthier growth. A unique hybrid applicator allows for precise application to lashes, lash lines or brows. The clear eyelash and eyebrow growth serum is quick drying. It can be worn alone or under mascara for easy, ongoing use.