Prosthodontic rehabilitation of a completely edentulous maxillary arch is always challenging in exaggerated gag reflex patients. However, the exaggerated gag reflex imparts discomfort, less patient cooperation and significantly impairs the impression making procedure in the process of fabrication of complete dentures. Thermo stands for water and sectional stands for part. The thermo-sectional tray design includes three parts; Section 1 or the ridge section of the tray, Section 2 or the thermo-palatal section of the tray with water inlet, and the Handle. The aim of the thermo-sectional tray design is to minimise the gagging reflex in an exaggerated gag reflex patient while making the final impression of an edentulous maxillary arch and to overcome the limitations of bulk in conventional autopolymerising acrylic resin custom tray, more palatal coverage, and increase period of contact of the tray with the palate during border moulding and wash impression.