Setting Spray This setting spray lays a thin barrier over your makeup, making it more smudge and moisture-proof. This incredibly versatile product has a myriad of uses. Makeup artists love to use it as a barrier under makeup to combat sweat and oil, or as an additional insurance coat over setting powders. A quick spray adds extra adhesion to light, loose Luster™ powders. It can even be used to adhere powdered glitters to hair or skin. How ever you use this wonderful product, we are sure that it will be a staple in your makeup kit. To Use: Use as a sweat barrier spray UNDER a makeup application, if needed. Mist over dry or powder makeup to set and provide a smudge-proof protective finish.