What is the best sealer/waterproofer to put on a basement floor that I just want to paint. New construction, no water problems, but washer & drier & water heater are in basement and add to moisture in the air.
Concrete – Should I seal, waterproof a concrete basement floor before painting
basementconcretefloor
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In the end, I ended up using DRYLOK® LATEX CONCRETE FLOOR PAINT
It's holding up well so far, we'll see how it does over the next few years.
Would moisture be trapped? To some extent. Is it bad? No, once concrete has been mixed and started to cure, keeping it moist helps it get stronger and this effect can go on for a long time. In no case will it ever make the concrete weaker. See the graph at the end of this URL:
http://wgbis.ces.iisc.ernet.in/energy/water/paper/drinkingwater/wellsconstruction/appendix4.html
There are some who say the concrete in the Hoover Dam is still curing.
There is no need for concrete to breath from the point of view of the strength of the material. There will be moisture retained from the original mix and it is possible some are confused about the chemistry of concrete and think it needs to dry, but the truth is the complete opposite of that.
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Best Answer
I'd suggest one of two options:
I much prefer the look of stained concrete to painted concrete, but that's obviously a personal choice. We stained our concrete basement floor when we finished it and sealed it with a off-the-shelf concrete sealer.