Formulated for use with lace, skin, and poly perimeters on lace or monofilament bases, Keepers Product Leo Bond Liquid Adhesive’s inventive silicone and acrylic formula has something to offer every hair wearer. It is non-toxic, medical grade, and dries invisibly clear like water-based adhesives. It is easy to remove and offers simple cleanup with the right remover, like solvent-based adhesives. Excellent for extended wear, it provides a strong, long-lasting hold up to four weeks, depending on body chemistry. 2-ounce bottle.