Q. Should natural stone be sealed and then several coats of finish applied?
A. The latest technology for any natural stone floors is to never apply a floor finish, like we did 30 years ago. Natural stone, including concrete can be ground down to make it somewhat smooth, then a diamond impregnated pad is placed on a heavy machine along with weights. The starting point is usually 400 grit, then 800 grit. Next, a penetrating sealer or densifier may be applied to fill up any holes. Finally a 1,500 grit and then a 3,000 grit is used to polish to a shine. The process does take a while to complete.
A maintenance program might require spraying on a crystallization product, and burnishing with a diamond pad anywhere from once a week to once a month. Some floors may require a scrub and re-seal once a year. This process could be performed on your floors and then you never strip or finish again. There is equipment available to perform this operation. The only problem is getting a smooth surface on heavily worn and pitted concrete. Several large supermarket chains are removing VCT in some of their buildings and grinding and honing. It is reported to save about 70% of the cost on floor care and eliminates the cost of stripper, floor finish and daily burnishing.
How to become a floor care expert Learn More...