The purpose of an internal corner trim is to conceal the intersection of two walls at an inside corner. It has both practical and decorative uses.

In terms of function, an internal corner trim aids in shielding the corner joint from any water that may pass through the panels and reach the wall behind. An internal corner also contributes to a clean, polished look by concealing any flaws or gaps at the corner joint during installation.

Corner trim may visually enhance the coordination of colours in your bathroom.