2 fl oz 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