The skin under the eyes has a lot of movement.
When you use primer, you’re just creating a smooth film on the skin—but you’re not removing those little folds and creases.
If you don’t have any lines, primer works great.
But if you do?
As soon as your concealer dries down and you start talking, blinking, or smiling, the concealer can't move with it - So it cracks and collects.
The balm creates a soft and flexible surface, letting the concealer move WITH facial movement, rather than locking in place and cracking.