Question

Does anyone know how to make concrete/cement

Answer 1

When it's tomorrow: 

Answer 2

First, you mix the blood of innocent children with a small animal, and then you eat a laptop and wait for Einstein to come back from the dead and lecture you on the history of Bosnia and Herzegovina. When he's done, fly to Neptune in your jetpack, pick up some Kool Aid, pour it over Valamir Gluten, and BAM!! Concrete!!!!

Answer 3

Those who know 

Answer 4

"Accio concrete"

And it flies from another dimension onto your head