Step 3: Pop, Sand, and Polish!

Popping concrete out of mold

Grey Matter cures quickly, 12hrs tops! Conventional concrete from your local depot needs weeks of cure time and only reaches a fraction of Grey Matter’s strength. You can't wait for a week, you want an oompah loompah now!

If mixture feels firm to the touch it’s ready! Pop your casting out of the mold.


Sanding concrete

Use abrasives to smooth and polish your masterpiece.

Post your work in progress or finished piece to #concreteconcrete