It is easy for a contractor to offer a lower price if they use an inferior product. Furthermore they can lock you into a bi-yearly maintenance plan you may have not suspected by using a cheap solvent or water based acrylic sealer. Our system will last you upto ten years before needing to re-apply another coat to reinvigorate your space. Once started on the path of using a typical solvenated acrylic sealer, you must continue on that route and cannot switch to the more durable system we now recommend without stripping every last bit of that old sealer off.