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bcossa2001 t1_ja1lorg wrote

There are penetrating stains made for concrete…..typically you powderblast or shot blast the floor then acid etch and then apply the stain…. There are also concrete sealers…..as always the prep is the most important step. I highly recommend NOT using a clear one.
I would not use paint….

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digitalbus123 OP t1_ja1onl2 wrote

Even paint specifically for concrete?

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bcossa2001 t1_ja2mski wrote

Commercial contractor here….I’ve never seen paint applied to concrete….usually it’s some type of special coating like an epoxy which requires a high level of skill to look proper. The biggest issue is moisture vapor emission from the concrete itself that loosens the paint/coating. Companies who apply finishes to concrete will test for the slab for water vapor emission and if it exceeds a certain amount they apply a special sealer that typically costs as much as the finish product. Ground and polished concrete is a popular finish these days but it is an inexact science particularly when there are previous finishes as you are experiencing. You can buy less expensive curing/sealing compounds but these must be reapplied periodically to look nice. Even new slabs that are ground and polished may look bad because of different distribution of the aggregates within the concrete mix. This is not an indication of poor concrete - more a characteristic of concrete itself. It’s also difficult to grind concrete next to a wall…..you must use a different machine so you end up with variations between the ground finish on the concrete. We try to talk owners out of it, or at least convince them to use a tinted product….gray is a popular choice.

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knoegel t1_ja1ke5w wrote

Why are you painting concrete that gets walked on?

Strip everything and seal. Paint is for walls not floors.

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digitalbus123 OP t1_ja1kjtx wrote

The ground concrete looks horrible. You can see the patterns from all the different tiles from the home owners before us

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knoegel t1_ja1krty wrote

You can smooth out the concrete. Like sanding wood.

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RunTheBull13 t1_ja1q32u wrote

Was this a paint specifically for concrete floors and they were dry? Does it get moisture coming up through them from the ground?

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digitalbus123 OP t1_ja1q6s7 wrote

The paint is specifically for concrete! I wouldn’t think so about the moisture it’s indoors

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