odd one but yesterday i installed a safe, its been bolted into the wall and also into the floor boards, i want extra security so im going to partition around the safe and fill it with cement as the lid is at top i can vertually submerge the safe in the cement

its only a small safe and its inside a cupboard, i think in a load of cement will make it a right pain in ass to try to remove

but what cement? i just want to mix something and pour it in, i know theres normal cement that you mix sand and water with but is there anything else available from b&q etc?

how do they make the cement bricks or like the curbs for side road, thats a cement isnt it? can i buy something like that?