Fixing concrete cracks

[RCAutoworks]

The concrete in my garage is cracking, yes its because my garage is sinking on one side. I know the right way would be to tear it up and start new but I'm not going to go with that option. What I really want to do is coat the floor but the cracks are stopping me from doing so. Is there any products to fix cracks and fill them in ?

 

[Tom]

I know there are other products, but plastic auto body filler works great, is cheap and available just about anywhere.

 

[RCAutoworks]

I know there are other products, but plastic auto body filler works great, is cheap and available just about anywhere.

Really ? How well does it do in the cold ? I know a ton of bondo will crack over time, but this plastic stuff is different ?

 

[sharpshooter]

that could get expensive, if there was several cracks...

 

[Finley]

im in the same boat...i have 1 crack going from the left to the right, and it is sunken by 1/4 inch, so it makes leveling very difficult

 

[Tom]

If the concrete shifts, yes it will crack. It's not flexible. A gallon of body filler will fill a pretty good sized crack. As for the cold, I don't know of any reason there would be a problem. Most fillers will shrink so a second application may be required.

 

[Satatic]

I filled the seam between two slabs in my garage with bondo. That was like 2 years ago. The filler has held up but I never coated the floor with epoxy and the edges have kinda started to lift. Probably lack of adheasion and nothing to really help smooth that transition from concrete to filler.

 

[RCAutoworks]

Now when I said bondo cracks, I know if you use a lot on a car it will crack, but then again a car hits bumps and what not.

 

[rt66jt]

No matter what you fill cracks with, if the base material continues to move, the filler will crack. The exception is epoxy adhesive; then the epoxy will hold, and the concrete will crack. If you are sure the floor is done moving, there are many suitable patching products. I would skip the Bondo, and use a cementitious product. That way, you have the option of fixing/leveling/dressing up your floor with concrete or a topping product (underlayment or wear surface).