If a client has flat nail plates and requests a gel overlay, which gel should be used to create the arch?

Using builder gel is the appropriate choice for creating an arch on a client with flat nail plates. Builder gel has a thicker consistency and is specifically designed to add strength and structure to the nails, allowing for the creation of arches or curves that enhance the overall appearance and durability of the nail enhancement.

Builder gel is formulated to self-level to some extent, which helps in achieving a smooth and even surface. When applied appropriately, it supports the natural nail while providing the necessary shape that flat nail plates often lack. This key attribute is crucial for both aesthetic and functional reasons, as a proper arch helps distribute stress more evenly across the nail, reducing the risk of breakage or lifting.

In contrast, sculpting gel is more specialized for certain nail art techniques and may not provide the same level of strength or support as builder gel. Base gel primarily serves as an adhesion layer and does not have the thickness needed to create structure. A top coat is intended for finishing touches, providing a shine and sealing the design, but it does not serve as a structural element and therefore would not be suitable for creating an arch.