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Right additive to make cement waterproof

Discussion in 'Plastering and Rendering' started by B Souza, 8 Jan 2021.

  1. B Souza

    B Souza

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    Hi everyone,
    Happy New year.

    I moved into a house recently and noticed that the area around the doors and windows were filled with foam and I now see water seeping inside and wetting the walls. I want to put a layer of cement around the door and window to block this seepage.
    I'm a first time DIYer. 2 points I need advice on:
    1. What is the ratio of cement to sand I should use
    2. What additive should I add to this mixture to make it waterproof.
    I've bought this cement: https://www.toolstation.com/blue-circle-mastercrete-cement-handy-bag/p57285

    I saw the below products regarding waterproofing:
    1. https://www.toolstation.com/everbuild-202-integral-liquid-waterproofer/p80460
    Is this the right additive? or can someone kindly recommend the right additive to make the cement waterproof.

    Thanks a lot.
     
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    Last edited by a moderator: 10 Jan 2021
  4. B Souza

    B Souza

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    image of doors from outside. I want to put a 10cm cement border around the door. So want this cement to be waterproof.
     

    Attached Files:

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    Last edited by a moderator: 9 Jan 2021
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  6. B Souza

    B Souza

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    When you say "sbr the area before applying cement", you mean, I first chip the dash coat off, then on the base, I first apply the sbr liquid, right? And once this dries, then apply the cement mixture, right?

    Also, do I need to add the sbr to the sand/cement mixture too? If yes, what proportion?

    I did a search and would you recommend this one? https://www.screwfix.com/p/cementone-sbr-admixture-white-5ltr/91566

    Thanks.
     
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    Last edited by a moderator: 9 Jan 2021
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