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  1. D

    Can you vandex over blackjack?

    yes it needs removing or yes it can be applied over it. I've two builders who say the opposite.
  2. D

    Can you vandex over blackjack?

    Evening all, I've removed a load of render from the inside of the front wall of my house and it's got a layer of blackjack on it. I want to coat in vandex but do I need to remove the black jack first or can you apply vandex over the black jack?
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