GRIND & SEAL
Grind and Seal is a system where mechanical steps are taken to refine the floor. The number of steps taken will be determined on what floor will be sealed with. Floors are usually grouted by hand which can lead to unfilled pinholes, and greater colour variations due to products being used.
Guards come in many different types which are usually a form of modified polymers with higher solid contents that are film forming, such as Acrylic sealer that can give a similar look of a full mechanical polish.
Other sealers like Urethanes are commonly used, and as the system becomes higher build like Epoxies are typically tinted. Therefore, depending on which sealer is applied, will determine the number of steps of Refinement needed to achieve the finish. These being topical help to hide imperfections and in some cases pour quality workmanship to give the surface a finished look.
With a grind and seal system, you can expect to have to re-apply the topical guard coating in as little as 3+ years. This is based on which system is used and the thickness that the product is applied, the volume of use and maintenance. Keep in mind the topical guard coating is more prone to surface wear and scratches (unlike a mechanically polished system (MPC) where there is no guard coating to worry about, and would last at least 4x the amount of time before a reapplication of sealer may be required)