Bonder Kevin Nicholls 05/04/2021 34 Views A bonder is a product used in many systems and brands. It is a liquid formulated to enhance adhesion between the nail plate and the overlay. As with any nail product always follow manufacturers instructions. Related Articles: Exploring the Role of Nail Primer in UV Gel Nail ApplicationsNail Bed HyperkeratosisUnveiling the Causes of Nail Product Lifting