With DART Blue, the original Duobond UV resin is easily injected into the crack to restore the connection between the glass and the PVB layer. Additionally, this effectively draws air out of the crack by simply turning the plunger of DART Blue upward after resin injection, creating a high vacuum. The remaining air in the star will then gradually move towards the impact point where it is suctioned by DART Blue, and the remaining space in the crack is filled with the original Duobond UV resin, enabling a high-quality repair.