A word of caution to all from a client'squestion asking if he could applya waterborne epoxy coating to his garage floor in
January. NO !!!
Because concrete is a relatively porous man-made
compound full of salt and aggregate rock, lye
and setting materials, it has a tendency to absorb
moisture and cold from the ground and sub-grade
which creates problems for curing coatings in the dead
of winter. Concrete is subject to hygrostatic pressure
and will release salts, moisture and vapor backpressure
which can lift coatings if they are not applied correctly
during proper temperature ranges in the 55-70 degree
range. It is the number one reason why epoxy floor
installers scarify, blastrac and scabble old concrete floors
then flush powerwash prior to coating application.
Wait for better temperatures, make sure to acid etch/profile
then flush rinse all surfaces, wait 24-36hrs to dry, then
apply a coating system. The difference in longevity will make
itself apparent in the months to come. Fail to acid etch
will result in surface failure within 90-120 days and it
will need to be redone and constantly maintained. The goal
is a monolithic coating system impervious to staining, lifting
and this is only possible with the right surface preparation.
When you are ready to choose a coating system - choose
a waterborne 2 component epoxy which is HAPS free
and cures to form a solid thermoplastic sheet membrane
which strengthens concrete below and protects against
moisture decay and oil /hydrocarbon
solvent attack from leaking engines etc.