EPDM cold-shrink tubing is a rubber insulating sleeve pre‑expanded over a removable support mandrel. During installation, it is simply positioned, and the mandrel is withdrawn, allowing the radial pressure to form a tight seal that provides waterproofing and moisture resistance. With outstanding weather‑ and chemical‑resistance properties, it achieves a “breathable” sealing effect, making it an ideal sealing solution for communication cables, coaxial cables, and medium‑ and low‑voltage power cables.