Hi, i've got a block and base floating concrete floor with a void underneath it. There's crevices alongside the sides of the blocks where the blocks meet and i want to fill in these crevices as they go down to the air void and i'm worried about water vapour coming up. Can anyone recommend anything that i can spray in these 'cracks' that will harden, something like a foam. I dont want to use cement or ployfilla.
Filling in crevice cracks in a concrete floor
- Thread starter mart
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