Concrete prep for 100% epoxy

[LuckyRugger]

I'm planning to start to prep my garage floor (660 sqft attached garage not barn) this Thursday for an epoxy floor. My local Home Depot has a Clark rotary machine and diamabrush concrete prep pad. They had a concrete grinder but it was just returned broken (they charged the previous user the cost to replace). My question is will the Clark and Diamabrush do a good job preparing the floor for epoxy? They are also saying that the blade is to be used wet, can I do it dry? Does it make any difference for performance, clean-up, waiting time before primer, etc? Also, will I need to do the edges by hand with my hand held grinder? It seems like it will get within about an inch of the edge. If I need to grind by hand what cutter/disk should I use (dewalt double row diamond cup grinding wheel, etc).

Thanks,
Matt


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[LegacyIndustrial]

Diamabrush is a good grinder. And for those who disagree, I will put my DB against your powdered(say a prayer) etch any day of the week. That said the Edco grinder is better than the DB as it uses solid diamond tooling and puts more pressure on top of that tooling.

That DB gets so close to the wall you will only really need the hand grinder in the corners.

I like dry, wet makes a mess and delays coating for several days as the slab dries out.

 

[Armorpoxy]

We strongly don't recommend wet grinding, it leaves a slurry that can cure and be impossible to remove. Diamabrush is fine for light prep and scratching up for adhesion, Edco type is better if available. Check tool rental places for them.

 

[Jsf721]

Moisture barrier I'm going to redo my floor after the summer lasted 4 years. Contractor told me not need for barrier and he was wrong just do it

 

[LegacyIndustrial]

We strongly don't recommend wet grinding, it leaves a slurry that can cure and be impossible to remove. Diamabrush is fine for light prep and scratching up for adhesion, Edco type is better if available. Check tool rental places for them.

Scratches? Here is a pic showing a diamond grinder vs. a Diamabrush. Those don't look like scratches to me.




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[garagefirsttime]

Scratches? Here is a pic showing a diamond grinder vs. a Diamabrush. Those don't look like scratches to me.

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First time posting on the forum - found this on Google while trying to figure out how to prep my garage.

My local Home Depot doesn't have the Diamabrush Concrete Prep Tool, just the Coating Removal Tool. http://www6.homedepot.com/tool-truck-rental/Coating_Removal_Disc_7/12569/index.html

I did several passes over the floor with it and got it to this state. The picture is a bit dusty, but you can see where the white scratches are and where the darker gray spots got missed. Is this good enough for epoxy adhesion, or should I do acid etch on top of this?

Thanks!

 

[LegacyIndustrial]

As long as the areas that are darker absorb water readily, no beading, you should be ok. Tough to see from an iPhone.


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[Firering]

Scratches? Here is a pic showing a diamond grinder vs. a Diamabrush. Those don't look like scratches to me.




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Is the Diamabrush the one at the top? It looks more aggressive than the grinder if thats the one at the bottom.

 

[Wideopentuning]

I recently used the Diamabrush with Clark grinder from the Depot of Homes as well. I was initially worried that is was only lightly scratching the concrete but it did show to absorb water quickly. So far, my Armor Garage epoxy has been more durable than I could have ever imagined.

 

[LegacyIndustrial]

Is the Diamabrush the one at the top? It looks more aggressive than the grinder if thats the one at the bottom.

The Clarke Maintainer rotates are at higher RPMs than our Diamond Grinder. Therefore in some cases, in makes better time than the big-guy. This job was the case. In addition, in some cases the hardness of the bond is better suited for some surfaces. We run hard bond all the time on the diamond grinder as we typically find softer concrete. I suspect the Diamabrush teeth are a medium bond.

 

[chrispyny]

I have a question. The previous owner of my home painted only one side of my 2 car garage, or about 210 square feet. I have no clue what he used, or how long ago he put it down, but i think it was long ago, as the house is 43 years old and the floor paint is coming off in many spots.
Would a clark machine with aggressive diamabrush be suited to strip the paint off or do i have to go with an edco machine?

 

[LegacyIndustrial]

You would need the coating removal tool if DB. Otherwise go Edco.
Stay away from the Concrete Prep Tool Plus, it does not bite in as aggressively as the original prep tool.