Leveling Slumped Concrete Before Epoxy Coating

[BobD1001]

Hi All,

Brand new to the forum. I tried using the search, but was not able to find anything per my issue. I recently began prepping my 60ish year old garage for epoxy. There are two areas where the concrete has settled a bit and slopes into a corner about 1/4 inch from level. Filling the crack is no issue, I plan to use PC products masonry epoxy and feather it with a diamond cup on my angle grinder. My question is what can I effectively use to get the sloped area level with the rest? I was thinking to roughen the surface with a diamond cup, then use adhesion promoter, and then possibly self leveling cement, or resurfacing cement, floating it to level with the rest of the floor. Will this be okay to do before epoxy coating, or is there a better solution?

Thanks,
Bob

 

[Firebrick43]

There are company's that level concrete. They drill a hole and pump a slurry under the low corner. It hardens, they patch the hole and everything is level.

 

[Dirtydan69]

Depends on how large of an area it is. 1/4” isn’t worth pump jacking in my opinion. I’d lever it with self leveling concrete as you suggested.

 

[LXCam]

Polymer concrete, it's pricy but it's the best product that'll play nice with a coating and not delaminate.

 

[BobD1001]

Do you guys think that the CTS Concrete Leveler they sell at home depot would work? Its the only leveling cement I can find in the area, and is supposedly okay for exterior work.

 

[Shea]

Do you guys think that the CTS Concrete Leveler they sell at home depot would work? Its the only leveling cement I can find in the area, and is supposedly okay for exterior work.

No, you don't want to use it. It's an underlayment and not a wear surface. It's designed to have other flooring (tile, wood, carpet, etc.) placed over it. The spec sheets also state not use it as a wear surface.

 

[BobD1001]

Thanks for the tip Shea. I cant find anyone in my area (19426) that sells proper polymer concrete. Any tips for vendors? BTW I have been spending an unbelievable amount of time on your site reading everything about preping the floor. There was an MG-Krete vendor about an hour from me, but the store closed down a couple years ago.

 

[Marctrees]

Bob - No offence intended, but how about turning your attention to something more important?

I often overfocus on a detail, then realize it is no point.

Fill the crack, and move on.

I would rather leave as is rather than spend time, money, and worst... risk adhesion and other type unexpected possible problems.

Why ?... all said and done... does it really matter that the floor is off a bit in the grand scheme of things ?

Marc

 

[BobD1001]

Well I was finally able to find a local company that supplies their own epoxy concrete. Its a two part epoxy with a long pot life that you basically add a ton of silica sand to. I have already roughed the entire surface to be bonded with a diamond cup, and the owner there said I will definitely have an excellent bonding surface. It was $75ish per kit, and I got three of them just in case, and also to do some crack filling with. The product is called "CSMC Epoxy Bond Resurfacer & Patching".

Marc, Im an engineer, so im OCD by nature. I'm not looking for perfection, but this is the area my workbench will be, so having it somewhat level is important, and I need something that the epoxy floor coating will adhere well to.

 

[Marctrees]

Appropriate wood shim (s) under workbench much cheaper than $225.

Marc