White cement putty does not increase paint life.If the white cement putty has been applied for more than 20 days and left unpainted then its surface should be thoroughly sanded down with 80 No Emery Paper.There are also lot of cracks generated when coating is delayed on white cement putty surface.If white cement putty is applied, then it should be painted within one week, as after 15 days the white cement putty self-seals due to chemicals present in it to make it smooth.As there is quite a difference in the price of the qualities of paint. Go for normal variety like Simple Apex, Weathershield of normal quality.
WALL PUTTY FORMULA CRACK
, as you will not get the expected performance in terms of life of paint or properties like crack bridging etc. If you have applied putty already, then do not go for the high end expensive paint like Asian Paints Brand : Apex Ultima or, Weathershield Max by ICI Dulux (Akzo Noble) etc.Add waterproofing additive to plaster to make it watertight and to also improve the finish of the plaster.