With reduced engine noise masking in electric and hybrid vehicles, brake squeal has become increasingly problematic. This research focuses on two types of pressure-sensitive adhesives used in bonded damping shims: acrylic and silicone. Acrylic adhesives, known for low-to-medium temperature damping and medium-to-high temperature resistance, offer favorable bonding at room or slightly elevated temperatures. In contrast, silicone adhesives provide medium-to-high temperature damping with high temperature resistance, excelling in elevated temperature conditions. The experimental setup consists of three damping shim configurations: a shim with acrylic adhesive, a shim with silicone adhesive, and a shim with acrylic adhesive and a thinner steel layer. Each shim undergoes a series of tests, where the initial load versus displacement (LD) relationship is measured before and after a certain number of loading cycles that emulate a typical Motor-on-Caliper (MoC) condition. Shims are also subjected to an EPB-like cycling endurance test. The study reveals significant differences in adhesive bleeding (i.e. material migration) performance among the three shims. This investigation aims to determine how these adhesive types and varying steel layer thicknesses affect shim bonding strength under high-pressure, MoC-like applications typical in electric vehicles, thus influencing their long-term squeal reduction capabilities.