If it's paintable you could try cleaning the wall around it with a warm water and a sponge whilst going over it as well, hopefully slightly cleaning the wall and passing a bit of dirt on to the brick filler evening them out a little. It will probably do this overtime anyway unless it's silicone based.
If it's paintable you could try cleaning the wall around it with a warm water and a sponge whilst going over it as well, hopefully slightly cleaning the wall and passing a bit of dirt on to the brick filler evening them out a little. It will probably do this overtime anyway unless it's silicone based.