New in box, DERMELECT XL Eyelash And Brow Volumizer .24 oz Strengthens Thickens Repairs. Selling as is. Dermelect XL Lash Volumizer Serum is a conditioning treatment that uses a trio of peptides to help lashes appear thicker, fuller, and stronger. It is prostaglandin-free and does not contain sulfates, parabens, or artificial fragrances. The serum is applied to clean, dry lashes and eyebrows from root to tip and left on overnight