Once a floor has been sanded you will need to choose a suitable sealant for your floor(s). Lacquers are usually applied in three coats; a primer followed by two top coats.
After a primer is applied we buff the floor to remove and roughness that may have occurred after application due to the lacquer soaking in and lifting the grain of the timber. This process is called de-nibbing. The two main choices you will need to consider are the strength of the lacquer and the sheen. Most companies offer three strengths of lacquer: residential, semi-commercial and commercial. Of these three choices, commercial is the hardest waring and residential the least.
The sheens will vary from matt to silk to gloss. Most floors we sand and see are sealed with a matt finish.
Lacquers take between an hour to three to be touch dry. However, the curing time, as suggested by the manufacturer, is three days. It Is our experience that a floor will continue to harden over the coming weeks after being sealed. It is important to factor these timings in when deciding to have your floor sealed.
There are many other variations of lacquers like Natural, intense pigment and many others. These variations are applied as primers to give you the appearance you wish your floor to have and still maintain the durability.
Many other options are available and we would suggest you do some research and find the best product for your requirements.