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Step 8: Into the Freezer

The secret to the D.I.Y. Concrete hardening is cold freezing temperatures.
The secret to the D.I.Y. Concrete hardening is cold freezing temperatures. Photo: Andrew Liszewski | Gizmodo

Unlike real cement which slowly hardens as it dries into a permanent rock-like material, Tech Deck’s D.I.Y. Concrete only solidifies into a firm structure ready for grinds, ollies, and manuals after spending six to eight hours in the freezer. For a kid that’s actually kind of an excruciatingly long wait, but it’s much shorter than real concrete takes to completely harden.

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