.030' (0.75mm) Temporary Retainer Resin, 5' x 5' (127 x 127mm) 25/Bx. Soft EVA Resin is a rubber-like clear material easily formed and trimmed for bleaching trays, soft bruxing appliances, indirect bonding and TMJ splints. Stiff, clear material perfect for invisible orthodontic retainers. Sticks to acrylics for various dental appliances. Box of 25 sheets