Two Old Soft-Material Earmold Tricks

When I first started in this field there were two types of earmold materials that were in common usage: Lucite and Polyvinyl chloride, or PVC; Lucite being “hard” and PVC being “soft.” Since the mid-1990s, PVC earmolds such as Formaseal and Protint have given way to various forms of silicon-based materials.