Along with internal tiled floors at residential and commercial properties, we also specialise in the cleaning, restoration and sealing of all types of external tiled floors, including patios. This customer, who lives in the small town of Brackley in Northamptonshire, had made the unfortunate mistake of sealing a brand new Slate tiled patio without removing the layer of grout haze smeared across the surface of the tile first. With the grout trapped between the tile and the new sealant the sealer was unable to fulfil its potential and the entire floor appeared really dull and patchy. The customer contacted me about setting the situation right. My initial course of action was to remove the new sealer using Tile Doctor Remove & Go, which is specially designed to strip away sealant, as well as adhesives and paints in cases where building and decorating works have left the tiles stained. The product was applied liberally across the surface area of the patio and agitated using a rotary machine fitted with a special stripping pad. Of course, this was necessary because the grout haze could not be treated without removing the sealant first. The soiled cleaning solution was promptly soaked up using a wet-vac machine. Once the tiles were exposed I applied Tile Doctor Acid Gel, which is a blend of phosphoric and hydrochloric acids in more manageable gel form, all over the patio and allowed it to dwell for ten minutes to begin neutralising the grout haze. I then added a little water and worked the product into the patio with a stiff scrubbing brush and a rotary machine to ensure all grout haze was removed from the surface of the tiles. The remaining slurry was then removed using the wet vacuum, and I rinsed the area twice with plain water to ensure all cleaning products had been removed. It was them left to dry completely. I returned to the property several days later to give the patio a fresh seal now that it was free from grout haze. First, I gave the patio a vacuum and light mop to remove any dust and debris. The customer wanted the tiles as dark as possible, therefore I suggested we use Tile Doctor Stone Oil before sealing, as this would darken the Slate significantly. Once this was agreed, I applied one coat of Stone Oil, allowed an hour for the product to dry, and then followed this applying two coats of Tile Doctor Colour Grow sealer. This is our impregnating, colour enhancing sealant which provides maximum protection against ingrained dirt and stains, as well as a durable no-sheen finish. As you can see from the photographs, the Slate tiles experienced an impressive transformation. The fresh sealant, combined with the Stone Oil, really took the appearance of the tiles to a new level and, what’s more, it will be easier for the happy customer to keep it clean in the future. Phil Vissian Northamptonshire Tile Doctor