Bluesky Ridge Filler Base Coat is a gel polish coat designed for use with the Bluesky gel polish system. It is an innovation from Bluesky giving a flawless foundation for a gel polish manicure. The base coat is applied as a normal base coat and cured with a UV or LED lamp to smooth ridge lines. This eliminates the need for aggressive filing and smoothing of nails which will harm an already vulnerable nail. Bluesky Ridge Filler is the perfect choice for people with nail ridges who want a flawless gel polish manicure.