Why Silicone Hose Delaminates– Causes, Risks and Engineering Prevention. Introduction Silicone hose delamination is a common but often misunderstood failure mode in automotive, industrial, and hydrogen fuel cell applications.It occurs when bonding between silicone layers or between silicone and reinforcement weakens, leading to separation under heat, pressure, or long-term aging. At HOTOP, delamination is treated as a system-level engineering issue, …