Strictly speaking, wall putty is a fine powder made of white cement which is mixed with water & other additives to create a solution that is applied to the wall. If you apply the solution properly, it fills the cracks, imperfections, and gaps in the wall to create an even base for your paint.

Strictly speaking, wall putty is a fine powder made of white cement which is mixed with water & other additives to create a solution that is applied to the wall. If you apply the solution properly, it fills the cracks, imperfections, and gaps in the wall to create an even base for your paint.