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Old 17th November 2021, 15:28   #1
macafee2
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Default Help in deciding concrete sealer

I am really struggling to decide on what concrete sealer to buy, can you help with a recommendation please?

This is the paint i have

https://www.screwfix.com/p/leyland-t...rey-5ltr/88106

It went down well but I think the concrete like a lot of this place is carp. The paint is just rubbing off.

I am hoping a sealer will sink into the concrete and provide a decent surface that will accept paint.

thanks

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Old 17th November 2021, 15:42   #2
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I've used exactly the same product on my outdoor area and it's still good after 18 months use, did you wire brush the area first?
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Old 17th November 2021, 16:08   #3
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I've used exactly the same product on my outdoor area and it's still good after 18 months use, did you wire brush the area first?
some of it yes and some no. It is not dirt that is the problem.

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Old 17th November 2021, 16:46   #4
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some of it yes and some no. It is not dirt that is the problem.

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In that case have a chat with these folk, https://premiumpaints.co.uk/collecti...ncrete-sealers Explain your problem, they should be able to advise you on which product you need.
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Old 17th November 2021, 17:55   #5
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Paint sealer is most effective if applied whilst concrete is "green"
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Old 17th November 2021, 18:37   #6
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I've used that paint to good effect but applied it on one of the hottest and dryest days in the summer after a long, dry spell. I don't know if it would have been the same over damp concrete. I did leave it a couple of days to cure too.
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Old 17th November 2021, 19:46   #7
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You're right to first suspect the substrate.
Most 'old' slabs need to be physically or chemically scoured and then sealed before painting (and good paint is nearly always two-part chemical reactive). New slabs usually form some sort of calcium/salt surface layer as they dry out/cure and that too needs to be removed/neutralised before any painting. Not sure about how 'dry' it needs to be but if there isn't a damp proof membrane (DPM) then dampness will always migrate to the surface in which case you'll need something special (£££) so speak to the experts.

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Old 17th November 2021, 22:19   #8
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You're right to first suspect the substrate.
Most 'old' slabs need to be physically or chemically scoured and then sealed before painting (and good paint is nearly always two-part chemical reactive). New slabs usually form some sort of calcium/salt surface layer as they dry out/cure and that too needs to be removed/neutralised before any painting. Not sure about how 'dry' it needs to be but if there isn't a damp proof membrane (DPM) then dampness will always migrate to the surface in which case you'll need something special (£££) so speak to the experts.
looks and feels dry so do not think damp or dirt to be the issue, just poor grade, mixing, ratio of concrete.

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Old 17th November 2021, 23:17   #9
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You could just try sealing it with this and not painting it, or maybe paint it after with the one in your link ?
https://premiumpaints.co.uk/products...BoCLMIQAvD_BwE
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Old 18th November 2021, 09:25   #10
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You could just try sealing it with this and not painting it, or maybe paint it after with the one in your link ?
https://premiumpaints.co.uk/products...BoCLMIQAvD_BwE
thanks Arctic I will check them out, I see from the label on the tin they are in Worksop, that is not too far away from me

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