Ultinut t1_itz8zud wrote on October 27, 2022 at 12:07 PM

I painted my concrete basement floor as part of a finished basement reno about 10 yrs ago. I used self leveler concrete to smooth out shallow dips and a spot where we cut the slab to move a pipe. For final finish before paint I rented a floor grinder and went over the entire surface to smooth out the small features and prep it to take the paint. Its a very dusty process but might be a better way to prep your floor and get rid of the paint simultaneously.

circle22woman t1_itzbw3l wrote on October 27, 2022 at 12:34 PM

This is the smart move if you want a lasting fix.

Most paints are intentionally made to be resist staining and penetration. OP is likely going to see chipping or other issues in thin areas. Maybe not right away, but it won't last as long as grinding down to clean concrete.

SlimeQSlimeball t1_iu0ek6u wrote on October 27, 2022 at 5:01 PM

To piggyback this, I just had to grind down 12 sqft of ruined thinset off of a brand new shower pan and setting up a box fan pointed outside a window and closing the door behind me took care of 99% of the dust leaving the bathroom.

I had to wipe down the bathroom sink and vanity but the negative airflow saved the rest of the house from a LOT of dust.

Pechumes t1_iu1ank4 wrote on October 27, 2022 at 8:28 PM

I don’t think this was the question OP was asking. They’re asking about putting self leveler OVER a painted floor and if there would be adhesion issues of the self leveler to the painted surface.

Oenonaut t1_iu1jnhe wrote on October 27, 2022 at 9:27 PM

True, but this comment implies YES (there will be) by suggesting an alternate method to quickly prep the existing surface.

jackdawson1049 t1_iu2c3bt wrote on October 28, 2022 at 1:02 AM

Rent a grinder with a vacuum. Most of the big rental companies have them. Depending on how bad the floor is you may not need leveler when you are done.