Impression Tray Adhesives & Cleaners

About tray adhesives & cleaners

A tray adhesive chemically bonds the impression material to the tray, and a review calls it mandatory with vinyl polysiloxane. Without it the shrinkage of the material goes unchecked and the resulting die comes out smaller in height and diameter. Alginate adhesives are sold as a paint or a spray, and are left to dry for five minutes.

Painted on the tray before the material goes in, not mixed with the material. Adhesives are not interchangeable between materials.

Sources: Addition Silicone Impressions in Fixed Prosthodontics: Clinical Standpoints, 2023 (PMC10517288) · Cervino et al. 2018, Alginate Materials and Dental Impression Technique: A Current State of the Art (Mar Drugs)