Hi I have insulated detached gurrage it has 1-2'' wide concrete horizontal floor slab.

How should I repair please send me detail to buy materails also.

Thanks,

Ketan

Do you mean the crack is 2" wide? How thick is the slab and is there a footing or just a thinken edge. A 2" crack is not a good sign. You must fix and find the underlying cause before you even think about a patch.

If the CRACK is 1" or 2" wide, you have a serious settling problem or frost is lifting your floor.