• Heat-shrinkable outer tube: Made of cross-linked polyolefin, this clear outer layer shrinks when heated to seal the inner components.
• Reinforced strength member: A rod, typically stainless steel for single fibers or ceramic for ribbon fibers, adds rigidity to the splice point and prevents micro-bending or breakage.
• Hot-melt inner tube: An inner adhesive tube melts and encapsulates the fiber during heating, creating an environmental seal that protects the fiber from moisture and contaminants.

Types of splice protector sleeves

The type of sleeve is determined by the fiber configuration and its intended application: 

• Single-fiber sleeves: The most common type, these sleeves are designed for single-mode fibers. They often feature a stainless steel reinforcing rod and are available in various lengths, such as 40mm and 60mm.

• Ribbon fiber sleeves: These are used for multi-fiber ribbon splices. They use a ceramic reinforcement rod and are available in sizes that accommodate 2 to 12 fibers.

• FTTH drop cable sleeves: Designed for use with FTTH (Fiber-to-the-Home) flat drop cables, these sleeves typically feature dual steel rods for added protection.

• Mini and micro sleeves: These sleeves offer a smaller diameter for applications with limited space. Some suppliers, like , offer these for specific purposes, such as in distribution box splicing trays. 

Products and vendors (1,000 piece packs)

You can find packs of 1,000 fiber optic splice protector sleeves from various vendors and online marketplaces. Many of these products are transparent to allow for visual inspection.