Good vs bad concrete for epoxy

This a good video that anyone can do for testing good and bad (pourus
dusting concrete surfaces).

The beginning of the video shows GOOD concrete and the water stays or sits
on the concrete surface, this is a good floor to be polished.

The second or last part of the video shows water being poured onto the
concrete surface BUT almost immediately the concrete starts to soak up all
the poured water this is what we call a pourus dusting floor and if
polishing this type of concrete floor surface extra work will be required
during the initial grinding stages.

This type of pourus concrete floor surface will produce what we call
"dusting" it creates a dust especially in Factory, Industrial or Commercial
environments where heavy foot traffic and machinery is used.
Floors that have a "dusting" problem can cause problems with electrical or
computers and is bad for anyone who has health problems.
When we denisifying (hardening) this type of floor much more of the densifer
would be used than a good floor surface and we may have to repeat the
densifying several times to lock-up (seal) the floor service.

Floors with a dusting problem will powder under traffic of any kind and they
can be scratched with your finger nail and when sweeping the floors will
emit a lot of dust and dust particles in the air that you breathe.

For severe/bad concrete floor surfaces we wet grind the surface and then
apply a chemical concrete floor hardener sodium silicate (densifier), the
hardener may have to be applied several times until the floor stops soaking
up the densifier.

If you are thinking of covering a bad concrete "Dusting" surface that emits
dusting with carpet or a vinyl tile coverings you need to be aware that
without some prior proper preparation to the concrete surface first; as you
will need to place adhesives for floor coverings and the adhesives will not
bond to floors with a dusting problem, dusting will permeate through carpet
if the floors have not been properly prepared first.

We hope that this information has been of interest to you.
If you have a floor that has or you think that you have a concrete floor
with this problem; please contact us.