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help-fix rough concrete.

roughconcrete
Sat, 21 Sep 2019 17:09:14 GMT

I was told i troweled toosoon and was left with a powdery coat and rough concrete spots. I sanded down with the 3 diamond disc pads (60/120/200) but they are still not smooth.. Any ideas? I want it to be smooth not rough feeling.

britshim
Thu, 30 Jan 2020 02:40:46 GMT

Wet sanding would make all the difference! We have the same issue so I purchased wet/dry diamond sanding pads from Amazon and they made all the difference. If you look at the photo attached, the left side is without any sanding, the right side is wet sanded. You probably can’t fully are the roughness vs. smoothness here, but it really did make all the difference. [5958C27F-10F3-4EA7-AF32-C5CFD4561760](//muut.com/u/zforum/s3/:zforum:ovIP:5958c27f10f34ea7af32c5cfd4561760.jpeg.jpg)

scuba6388
Sun, 26 Apr 2020 16:31:44 GMT

That looks great! What grit did you get down to? Grinder or orbital sander?