How does Grout Magic work? Grout Magic is an effective grout dye that restores or changes the colour of tile grout. Another benefit is that it acts as a sealer that penetrates deeply into the grout. It will dramatically enhance the appearance of any wall or floor tile. Once applied & fully cured, Grout Magic will enhance the grout, by giving it a long-lasting protective seal. It will also inhibit the growth of mould & mildew on the tile grout. Grout Magic is a premium high-quality alternative to the Grout Pen. RESTORERS & SEALS GROUT IN ONE GO TURNS OLD GROUT BRAND NEW REMOVES GROUT STAINS 10 COLOURS TO CHOOSE FROM - SAMPLES AVAILABLE