Polished concrete is not something laid on your floor. It is your floor, ground and refined until it reflects light, with nothing added on top. Epoxy is a film laid over the slab. In a garage anywhere along South Georgian Bay that one difference settles the question before anybody opens a colour chart, because polishing has to accept the concrete you already own.
We coat floors. We do not polish them. So read this knowing which side of it we sell, and check the sentences below against the sheets they come from.
The trade already draws the line for you
The Concrete Polishing Association of America wrote the vocabulary this industry specifies in, and its glossary puts a coated floor in a different category from a polished one. Surface coated concrete, it says, “does not conform to the definition of polished concrete”, because it is “the operation of applying a film forming coating to a concrete floor surface”.
So these are not two products bidding for the same slab. One is a treatment of the concrete. The other is an object placed on the concrete. Everything that follows comes out of that.
Bonded abrasive polishing runs a sequence of diamond passes: a grinding stage at 100 grit and below, a honing stage between 100 and 400 grit, and a polishing stage at 800 grit and higher. A lithium silicate densifier soaks into the surface along the way. PROSOCO describes its Consolideck LS as a “penetrating lithium silicate treatment” that “reacts with the concrete to produce insoluble calcium silicate hydrate within the concrete pores”. It hardens what the diamonds opened. It does not cover anything.
Polishing takes material away, and the look you choose sets how much
This is the part people skip, because polished floors are chosen from photographs and photographs do not show depth.
| Class | Name | Approximate cut depth |
|---|---|---|
| A | Cream | Very little |
| B | Fine aggregate, salt and pepper | 1/16 inch |
| C | Medium aggregate | 1/8 inch |
| D | Large aggregate | 1/4 inch |
The speckled salt-and-pepper floor that most people point at is a cut 1/16 inch into the slab. The stone-heavy one is a quarter inch. On a sound floor that is a finish choice, but the material is gone for good. On a floor whose top layer has already gone, it is the entire question.
Which slab you actually have
There are two answers to that in this town, and they are not close together. Requests for epoxy flooring in Collingwood arrive from new subdivision garages sitting on a modern vapour barrier, and from detached garages behind the older streets where the concrete went straight onto grade.
On the newer slab, polished concrete is a real choice and the rest of this post is the decision.
On the older one it usually is not, and the reason is arithmetic rather than opinion. Decades of chloride carried in off the road produces spalling and a sandy surface you can feel through a boot. Grinding an eighth of an inch off that does not reach clean concrete; it exposes the pitting and then leaves it there, permanently, because polishing adds nothing that could fill it. That floor wants concrete repair in Collingwood first, and a finish conversation second. How far salt damage on a Collingwood garage floor has gone is easiest to read in the fortnight after the last of the brine dries off it.
What a densified slab does well, and where it stops
Two things are genuinely better about polishing. The first is printed on the manufacturer’s own sheet. The second is our own reading of how the floor is built.
It cannot let go. The Consolideck LS advantages list says the treatment “will not yellow, discolor, peel or flake”. Delamination is the failure mode that brings us to most garages, and a floor with no film has no bond line to fail at.
It does not hide a surprise. This one is our observation, not the sheet’s. A coating conceals the concrete under it for years. A polished floor shows you its own condition every day it is down.
The stopping point is on the sheet. The treated surface exhibits “reduced water absorption upon drying”, and “maximum water resistance will develop over 7 days”. Reduced, not stopped. For oil the sheet sends you to a separate product entirely: “For improved resistance to water or oily stains with no change to surface appearance, apply Concrete Protector SB.” And its maintenance section warns that “acid concentrates and acidic foods may etch the floor and leave a residual stain”, with the instruction to “clean up spills quickly”.
Put that in a garage that takes a vehicle off Highway 26 all winter and you have a floor with a maintenance schedule rather than a barrier. That is workable. It is a different deal from the one most people think they are buying.
The two things people ask last and should ask first
Grip. PROSOCO states that “gloss and hardness do not reduce slip resistance”, and there is no reason to doubt it. But a smooth wet floor is still a smooth wet floor, and on the epoxy flooring we lay in The Blue Mountains the answer is an aggressive aggregate grade in the top coat. Polishing has no top coat to put it in.
Joints and repairs. The saw cuts in your slab keep moving, and neither finish makes them disappear. A coating can be built over a joint that has been filled and honoured. A polished floor shows the joint, shows the fill, and shows every old patch, because grouting in polishing work is there to fill surface pores rather than to hide a repair.
What decides it on the driveway
Not the finish. The reading. Concrete grinding in Collingwood takes both finishes to the same starting line, and what the slab looks like at that moment tells you which one it can carry: how deep the damage goes, whether the joints are stable, how much moisture is moving through, and whether an eighth of an inch of grinding lands on sound concrete or on more of the same.
On a clean new slab in a heated shop, polished concrete is a good floor and we will say so. On a salted, pitted bay in an unheated garage between here and Wasaga Beach, a film that covers the damage and takes the brine is usually the honest answer. Tell us which of the two Collingwood slabs you have, or let us read it on the day, and the finish question answers itself. If a coating is where your slab points, the garage floor coating cost in Collingwood is set out per square foot in its own guide.