There are basically five (5) main types of surface
finishes:
1.Oil-modified urethane
is generally the most common surface finish and is easy to apply. It is
a solvent-base polyurethane that dries in about eight hours. This type
of finish ambers with age.
2.Moisture-cure urethane
is a water-base polyurethane that is more durable and more moisture
resistant than other surface finishes. Moisture-cure urethane comes
in non-yellowing and in ambering types and is generally available in
satin or gloss. These finishes are extremely difficult to apply, have
a strong odor and are best left to the professional.
3.Swedish finish or acid
cure urethane is a clear and fast drying finish. It is durable
and non-yellowing. These finishes have an extremely strong odor and
should be applied by the highly skilled wood flooring professional.
4.Water-based urethane
is a waterborne urethane that dries by water evaporation. These finishes
are clear and non-yellowing. They have a milder odor than oil-modified
finishes have and they dry in about two to three hours. Water-based
urethanes are generally more expensive.
5.Alumiunum Oxide Finishes
are the newest in wood floor finishes that offers a long lasting more
durable coating than past wood floor finishes. These finishes carry
a limited 25 year wear warranties, and are available on most major pre-finished
wood floors. These finishes are not available to the general public.
What type of finish do
you have?
Here are some simple steps to help you determine if the finish is a
wax finish, shellac or varnish finish or a surface finish. If the floor
was installed, or last serviced, before the mid '60s, you should assume
the finish used was varnish or shellac. To determine this, scratch the
surface with a coin or other sharp object in a corner or other inconspicuous
space. If the finish flakes, it is probably shellac or varnish. Shellac
and varnish are rarely used anymore and require full sanding to remove
before application of a surface finish or wax finish.
Next, check the floor for wax finish. In an inconspicuous
area, corner or behind a door, apply two(2) drops of water. If, within
ten minutes, white spots appear under the drops of water, the floor
has a wax finish. To remove the white spots, gently rub the spots with
steel wool dampened with wax.
If the finish does not flake from scratching
with a coin and white spots do not appear from the drops of water, the
floor has a surface finish and should be maintained accordingly.
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