Easy to PlacepalDam and OpalDam Green are easily expressed directly where theye needed in the mouth via the simple syringe-and-tip delivery.Easy to RemovepalDam and OpalDam Green remove easily from the mouth. Simply use an explorer or other instrument to cleanly break the cured resin from undercuts and discard.Perfect for In-Office Whitening Procedures:hen whitening agents with higher concentrations of hydrogen peroxide are used, they can irritate the gingiva. Expressing a ribbon of OpalDam or OpalDam Green along the gingival margin protects the soft tissues, keeping them comfortable during treatment.