🔹Designed for Large Diameter Cables – This 1 inch heat shrink tubing with a 3:1 shrink ratio seals tightly from 1 inch down to 1/3 inch, making it ideal for battery cables, thick wire splices, hydraulic hoses, and industrial connectors. 🔹Dual Wall Adhesive Lined Protection – The inner adhesive melts and flows during heating, forming a waterproof, airtight seal that protects against moisture, corrosion, fuel, oil, and salt spray. 🔹Marine & Outdoor Rated – Built for boats, trailers, RVs, off-road vehicles, solar systems, and outdoor wiring projects where standard heat shrink tubing often fails. 🔹Flame Retardant & Durable Material – Made from industrial-grade polyolefin with flame-retardant properties, offering excellent insulation, strain relief, and abrasion resistance for long-term use. 🔹50FT Continuous Roll for Custom Lengths – No pre-cut pieces. Cut exactly the length you need for each project, reducing waste and making it ideal for professionals, electricians, and serious DIY users. This adhesive lined heat shrink tubing is designed for sealing and protecting large diameter cables in marine, automotive, and industrial environments. With a 3:1 shrink ratio, it easily fits over large connectors and shrinks tightly to create a secure, waterproof seal. The dual wall construction features a tough outer sleeve and an inner adhesive layer that melts during heating, forming an airtight barrier against moisture, corrosion, oil, fuel, and salt spray. This makes it ideal for battery cables, hydraulic hoses, heavy-duty wire splices, and outdoor electrical connections. Supplied as a 50-foot continuous roll, this heat shrink tubing allows you to cut the exact length needed for each job, reducing waste and improving efficiency for professional and industrial applications.