Grout is the hard material installed between tiles – not to be confused with silicone which generally goes around the edges of the tiled area. Most grouts are made from cement (just like concrete) and are extremely porous. This means they are not waterproof and will absorb moisture plus whatever contaminant is in that moisture. Think of an oil stain on a concrete driveway.

Now consider how a floor is typically cleaned:

A bucket of water containing a cleaning chemical (Handy Andy or similar) is mopped onto the surface. It is spread around, scrubbed a bit, and then usually left to air dry. So what is happening here?
The bucket of water gradually gets dirtier and the water sloshed onto the tiles runs into the lowest part of the floor – the grout line. This dirty water is then absorbed into the porous grout, the water evaporates, and the dirt is left in the grout where it can permanently stain it.
Once stained, no amount of scrubbing will get that grout looking like new again. Think of it like a stain on a shirt…you can wash it hundreds of times so it is clean, but the stain remains. bleach, or baking soda and vinegar might make a slight improvement, but it doesn’t solve the problem.

The only way to stop this is to have the grout sealed so that it will no longer absorb the dirty water. Tilers rarely seal new grout, and while some modern grouts claim to be water repellent, they still stain unless additionally sealed. Effectively sealed grout can be easily maintained without the use of harsh chemical floor cleaners.

GroutPro can refurbish even the most stained grout by deep extraction cleaning, re-colouring, and sealing it so it doesn’t stain again. Once this is done, the best way to keep it looking like new is a weekly mop with a PH Neutral floor cleaner followed by a towel dry to remove the residue from the surface. Your tiled area should then look like new for years to come.