For Air casters (also known as Air skates, Air bearings) to function properly, it is important that the floor is airtight, smooth and flat. The air that comes out of the membrane lifts the mass and makes it float. If the floor is not airtight, air will escape into the floor and remove the pressure needed to create an air film. However, a lack of floor coating is not a problem. Any type of floor will work with Air casters as long as they are smooth, flat and airtight.
When the object is floating, there is a wafer-thin film of air, which is only tenths of a millimeter thick (about the thickness of a human hair). A smooth floor ensures that the air film remains intact so that the mass continues to float. Small deviations in the floor can easily be absorbed by the caster, but the caster cannot go up or down steps. The better the floor, the better the air consumption. Less suitable floors can lead to higher air consumption, more friction and therefore more wear on the bladder of the caster.