BLUFIXX KIT FOR TILES, GRANITE AND MARBLES BLACK A borehole or a chipped tile is not only unattractive but also expensive or cumbersome to repair. In the future, you will fill boreholes or chips in tiles almost invisibly with the BLUFIXX Repair Pen. The gel is available in black and white. For a gray or marbled color result, the black and white gel can be mixed to achieve the desired result. The kit includes the LED and the pen/holder.