Barrier Spray™ was developed as an under base for 3-D Gelatin appliances to increase durability. Barrier Spray™ by Mehron is "wonder spray" that also works to insulate sensitive skin from harsh adhesives. Barrier Spray™ may be misted on top of finished powder makeup to set and preserve the makeup application. Barrier Spray™ can be used under makeup to stop sweat or over makeup to set it after applying ColorSet Powder. Barrier Spray™ is another innovation of Mehron, Premier Performance Makeup. 2 oz. Spray Pump Bottle.