most waterproof way to seal concrete?

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Batman

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#280851 15-Jan-2021 09:42

Say someone had drilled a hole into concrete in the past but i want to seal the hole and make it as waterproof as possible in the process, what's the best way to do that?

Would this process be similar to seal a hole in bricks/mortar?

mdooher

Hmm, what to write...
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#2635867 15-Jan-2021 10:29

Bostick Seal'nFlex Grey

Matthew

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#2635886 15-Jan-2021 11:12

Is this a concrete retaining wall? Patio? Wall? Post? Ideally, you would waterproof the entire surface of the concrete structure.

timmmay

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#2635900 15-Jan-2021 11:37

Pack the hole with wheatbix. That stuff is super difficult to get off once it's wet.

Batman

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#2636007 15-Jan-2021 13:20

mdooher:

Bostick Seal'nFlex Grey

ok thanks

SepticSceptic

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#2636365 16-Jan-2021 09:19

Epoxy.

Used for cracked foundations etc.

You can use additive powders for additional strength and gap filling

D1023319

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#2642547 26-Jan-2021 19:46

Really need to see a picture.

For the hole - i'd patch it with motar with a high cement ratio to ensure water proofness and then water proof coat the whole wall.

I am not really in favour of tanking products as they only provide a water/moisture barrier as a layer on the concrete wall.

For a nib wall in my house that was below ground level - i coated it in Kyrstol Coat T1 and T2.
It penetrates concrete with filaments and the wetter it is the better it works. it keeps working over years.

I also have coated the brick perimeter wall of my 1920s bungalow to stop any potential of wicking damp as some parts were weeping while calcium..
Its sorted now.

https://fraservalleyconcrete.com/wp-content/uploads/2018/05/Technical-Data-Sheet-Krystol-T1-T2.pdf .
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