We have got a very strong representative in India called at Appar Group. I would suggest contacting them at 91-120-409-0900.
It is difficult for me to make specific recommendations for your situation given I do not have a strong understanding of the other construction products in India. Specifically, I do not know what is commonly used to waterproof the sand cement parge coat that is being installed on the brick.
If you have trouble getting in touch with Appar please contact me back directly at email@example.com
Posted on 25 Jan 2016