Mix one part Type 1 Portland cement and one part fine sand by volume. Add water until the mixture is the consistency of thick ...

This strange white paste might not look like much, but it might help solve the sand shortage, while making the cement ...

Repeat Steps 2 and 3 four times. On the 4th sanding, use 220-grit sandpaper. Apply 5 coats of satin concrete sealer using a clean cloth and following manufacturer's instructions. Let it dry.

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looking at it through a screen made with sand, surrounded by buildings made with concrete. I could let you guess what's in concrete, but I suspect you're already catching onto a theme here.