20 - 25 psi is needed for Cerakote. This is because the molecules in the coating are relatively large and need higher pressure to be pushed through the small opening in the nozzle. The size of the opening in the nozzle will also affect the amount of pressure needed. A smaller opening will require more pressure to push the coating through, while a larger opening will require less pressure. The ideal pressure for spraying Cerakote is 20 - 25 psi. This will ensure that the coating is properly applied to the surface and that it will have a smooth, even finish.