Retainer 500g is a SprintRay biocompatible 3D printing resin for the direct production of crystal-clear orthodontic retainers. It removes the need to print models and thermoform sheets, supporting a streamlined scan-to-retainer workflow with automatic AI design. The formulation combines translucency, mechanical properties and a simple post-processing workflow for same-appointment delivery. Compatible with SprintRay Pro S and Pro 2 printers and designed exclusively for NanoCure post-curing. Supplied in a 500g bottle.