Our Semi-Permanent Color Enhancer is a unique coloring enhancer that is used to outline the hairline. It is used to fill in light spots within the hair to allow for a cleaner finishing look. This enhancer is a thin coat which allows it to be used for airbrush compressors. With its thinness, it prevents any clogging within the air compressor gun. This product is design to last for 3-5 days after installing and applying a holding spray to it.