A plywood subfloor can be converted into a beautiful concrete floor using self leveling concrete, Param 5500. Recently, Mirage Studios of Valley Stream, NY resurfaced an existing wood floor with self leveling concrete on 19th floor of a building on 3rd Avenue in NYC. It took 5 days to complete the whole process. The first three days were full working days where as the last two days were partial working days because of the sealer application process. One coat of water based, low VOC- epoxy primer/sealer, Perdure E32 was applied and two coats of water based, low VOC-polyurethane top coat, Perdure U45 was applied to give better abrasion resistance.