Waterproof kajal makes your eyes dry, you should not overuse it.
I used it for whole 2 years. Initially I used to like it very much, but later on, my eyes started getting itchy and dry. I used to rub my eyes such much due to dryness and that lead to infection also.
My eye specialist told me that I should not use waterproof makeup on eyes. Instead go for herbal kaajals like HImalaya, Oriflame, Lotus, etc.
When I quit colossal, my eyes got back to normal within 10-15 days. Now I use himalaya or lotus herbal kaajal only and my eyes don’t get irritated anymore.
It is okay to use it once in a while, during dates, parties or functions, but its not good on daily basis.