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alive&kicking23 Jun 2020 21:50Hello,
in our new build, we have a few exposed concrete walls and ceilings.
(The quotes speak for themselves!)
But it’s not a big problem; we managed quite well with concrete filler.
For sealing, we used lithium water glass diluted 4:1 with distilled H2O. On the walls, this worked perfectly—no abrasion or dust.
Unfortunately, it doesn’t work at all on the ceilings. Even after applying it heavily three times (sprayed on), they still produce dust.
Which alternative product would you recommend? It should be colorless and not darken the concrete surfaces too much.
Thank you very much for your replies.
in our new build, we have a few exposed concrete walls and ceilings.
(The quotes speak for themselves!)
But it’s not a big problem; we managed quite well with concrete filler.
For sealing, we used lithium water glass diluted 4:1 with distilled H2O. On the walls, this worked perfectly—no abrasion or dust.
Unfortunately, it doesn’t work at all on the ceilings. Even after applying it heavily three times (sprayed on), they still produce dust.
Which alternative product would you recommend? It should be colorless and not darken the concrete surfaces too much.
Thank you very much for your replies.
Sodium silicate should always work. Were the ceilings still damp? It takes a long time for concrete to fully dry. Or were there still residues on it?
If sodium silicate doesn’t work, I’m afraid that sealants or impregnations won’t hold either.
On the ceiling, it doesn’t really matter. You don’t usually come into contact with it in everyday life.
If sodium silicate doesn’t work, I’m afraid that sealants or impregnations won’t hold either.
On the ceiling, it doesn’t really matter. You don’t usually come into contact with it in everyday life.
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alive&kicking24 Jun 2020 09:00Hello Rick,
The concrete is no longer damp, it is already 1 year old, with no visible residues. The water glass is also well absorbed, covering the entire surface.
On the ceilings, the water glass does not fully bind the concrete; when you run your hand over it, it feels slightly dusty. Even when the area is completely dusted, it becomes slightly dusty again the next day. I’m concerned that this might become a permanent source of dust in the future. (Maybe it works better on the walls due to the applied concrete skim coat.)
If you are familiar with this, do you think there is a difference between lithium silicate and potassium silicate water glass? Which mixture would you recommend? How many applications?
The concrete is no longer damp, it is already 1 year old, with no visible residues. The water glass is also well absorbed, covering the entire surface.
On the ceilings, the water glass does not fully bind the concrete; when you run your hand over it, it feels slightly dusty. Even when the area is completely dusted, it becomes slightly dusty again the next day. I’m concerned that this might become a permanent source of dust in the future. (Maybe it works better on the walls due to the applied concrete skim coat.)
If you are familiar with this, do you think there is a difference between lithium silicate and potassium silicate water glass? Which mixture would you recommend? How many applications?
Usually, one application is enough to vitrify the concrete.
Lithium waterglass is the "highest quality."
Potassium waterglass is more water-soluble and therefore not quite as suitable for outdoor use.
Indoors, it doesn't matter. Sodium waterglass makes no sense at all.
What happens if you spray water on the ceiling? Does it soak in or not?
If it doesn't, the surface is vitrified. Then the dust comes from somewhere else.
Lithium waterglass is the "highest quality."
Potassium waterglass is more water-soluble and therefore not quite as suitable for outdoor use.
Indoors, it doesn't matter. Sodium waterglass makes no sense at all.
What happens if you spray water on the ceiling? Does it soak in or not?
If it doesn't, the surface is vitrified. Then the dust comes from somewhere else.
A
alive&kicking24 Jun 2020 09:17The ceilings (but also the walls) absorb a significant amount of water even after multiple applications of the water glass mixture. I found this surprising because, in theory, they are not supposed to do that.