Does Waterproof Paint Stop Leakage of Water Through a Wall?

I'm afraid waterproof paint is not the solution to stop leekage. There is a big difference between water seepage and sealing a wall. The sealed wall is designed to stop moisture from passing through. Yes - waterproof paint could on a temporary basis stop the problem but it would be only temporary. Unless you physically change the routing of the water - you will still have that problem to deal with. Moisture is different from water seepage. If your roof leaks, waterproof paint could stop the problem for a short while, but it will not fix your roof unless you reroute the water. The water would still be in your walls and you can bet you'd still have issues to deal with. And it will only get worse over time.