The hot-melt adhesive inner tube bonds to both the fiber and the heat shrinkable outer tube to encapsulate the fusion splice joint and provides vibration damping and an environmental seal, protecting the fiber from damage and contaminants. Corning Fiber Optic Splice Closures are designed for splicing fibers in aerial, duct and buried applications. As mentioned in the installation guide, please refer to Table 1 for the proper heat settings to program in your fusion splicer to ensure a proper installation of the heat shrinkable splice protection sleeve inside the Belden FX Fusion Splice-On Connector. Our fiber optic fusion splice protector sleeves are manufactured pre-shrunk in a heat-bonded assembly that consists of three components:. This guide explores the mechanical physics of fusion, the forensic analysis of cleave failures, and the engineering protocols required to achieve the "Zero-Loss" goal in high-density 400G and 800G optical backbones.