Rubber is one of the most frequently used materials in the construction of waterproof cable splices due to its excellent sealing capabilities. Natural and synthetic rubbers are both used, and their flexibility allows them to form tight, effective seals around cables. This prevents water from entering and disrupting the connection, which is particularly important in outdoor and marine environments where cables are exposed to rain, waves, and humidity. The elasticity of rubber ensures that waterproof cable splices remain intact even when subjected to vibrations, shifts, or bending, which can otherwise compromise the integrity of a splice. Additionally, rubber’s resistance to wear and tear further enhances the longevity of waterproof cable splices, making it a reliable choice for applications where long-term durability is needed.