Fix and grout tub this fix and grout tub is for both fixing and grouting ceramic tiles to most interior surfaces ideal for use in areas subject to wet conditions and condensation such as bathrooms showers and kitchens thanks to the water resistant formulation and is ideal for grouting too this tub meets the requirements of bs en 12004 fix and grout tub ideal for grouting and fixing water resistant formulation complies with bs en 12004 500g tub 500g