WONDERGEL 3 cc Syringe Wondergel is used during the build-up and contour phases to hold crowns, veneers, and small castings in place. Wondergel is recommeded for pressed porcelain veneers, pfm crowns, & alumina & zirconia restorations. Benefits include: It is like having an extra helping hand; easier to handle small & loose fitting restorations; no risk of contamination; & it is water-soluble.