Why does yellow paint not adhere to concrete curbs?
Some concrete curbs hold paint beautifully, and others are chronic peelers. One extreme or the other, and there seems to be very few properties that are marginally peeling. Curbs that have yellow paint that habitually peels are showing current symptoms of a problem that was generated when the curbs were first poured. Concrete takes 28 days to reach its full hardness, and can give off dust for another 6 months after that. Therefore the curb must be allowed to fully cure before paint is applied. Even then it is necessary that a thorough brushing or air blowing be done prior to painting. If this is not done, the curbs will peel, and peel again, over time. If you look closely at your peeled paint, it generally peels all the way down to the original concrete. There may be 2 – 10 layers of paint but they all come off at once. Therefore the problem is not with the most recent painting job but with the original one. One solution is to sand blast or water blast all of the paint off the curb bac
