Water Blocking Tape / Water Swellable Tape | SAP Longitudinal Water Blocking for Cables

Water Blocking Tape, also known as Water Swellable Tape, is a high-performance non-woven tape impregnated with superabsorbent polymers (SAP). It is specifically engineered to prevent longitudinal water penetration into cable cores by rapidly absorbing water and forming a dense gel barrier that seals gaps and channels. This advanced material delivers reliable moisture protection for optical fiber cables, data cables, telecom cables, control cables, and power cables, ensuring long-term electrical and optical integrity even in wet or flooded environments.

Water Blocking Yarn | Water Swellable Yarn For Longitudinal Cable Protection

Water Blocking Yarn, also known as Water Swellable Yarn, is a high-performance water-blocking material widely used in modern cable manufacturing. It combines high-strength industrial polyester (or nylon) filaments with superabsorbent polymers (SAP) and specialized adhesives. When exposed to water, the yarn rapidly absorbs moisture and expands to form a dense gel that effectively seals cable interstices, preventing longitudinal water penetration along the cable core.