Bathtub Refinishing Kit Gloss White 21.5oz Tub Paint Reglazing, Tub and Tile … por | 18 Jul 2026Bathtub Paint Easy To Use: Pour the Hardener (Part B) and Adhesion enhancer (Part C) into Part A and mix for about 60 s. Use a brush or roller to apply it to the bathtub, sink or tiles, and it will be fully cured in 24 hours.