INTRODUCTION
While polyurethanes are widely recognised as the most durable surface coatings for floors, they are inevitably subject to wear, particularly when any gritty substance is introduced onto the floor. Grit will act in the same manner as sandpaper, and large particles of grit under shoe,soles or heavy furniture will not only cut through the coating but damage the timber or cork as well.
Furthermore, it is important to understand that the average polyurethane coating system is only about 120 microns (0.12 mm) thick, and therefore cannot prevent indentation of timber when subjected to excessive forces such as occasioned by stiletto heels or certain castor wheels. The incidence of indentation will also be directly related to the density of the timber or cork; that is hardwoods such as Brushbox or Blackbutt are much less predisposed to indentation than softer timbers such as Baltic Pine or Cypress Pine