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