Barrier Spray was developed as an under base for 3-D Gelatin appliances to increase durability. Barrier Spray by Mehron is, incheswonder spray inches that also works to insu 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.Special Shipping Information: This item ships separately from other items in your order. This item canot ship to a PO. Box. This item may be subject to additional processing days.ITEM IS NOT ELIGIBLE FOR EXPEDITED SHIPPING.