Black putty for optical cables

Non-hardening black putty is ideal for sealing, insulating, and protecting optical cables from moisture, corrosion, and electrical leakage.

Overview

Black putty designed for optical and electrical cables is typically soft, flexible, and non-hardening, allowing it to conform to irregular shapes and maintain a seal over time without cracking or shrinking. It is used to block and fill cable joints, couplers, junction boxes, and glands, providing protection against dampness and preventing short circuits or corrosion of contacts in industrial environments .

Key Properties

• Non-hardening and flexible: Remains soft and moldable, making it easy to apply and remove if necessary .
• Chemical resistance: Resistant to oils, detergents, grease, water, caustic soda, petrol, alcohols, and mild acids, ensuring durability in harsh environments .
• Temperature tolerance: Typically functional in a range from approximately -20°C to 85°C, suitable for most indoor and outdoor cable installations .
• Electrical insulation: Prevents electrical leakage and short circuits, which is critical for sensitive optical and electrical systems .

Applications

• Sealing and insulating optical fiber splices and joints.
• Filling junction boxes, couplers, and switchgear to prevent moisture ingress.
• Protecting industrial electrical components from corrosion and environmental damage.
• Temporary or permanent sealing where removability may be required, such as maintenance or testing scenarios .

Recommended Products

• S391 Non-Hardening Sealing Putty: Available in sticks or bulk, black, soft, and easy to mold, suitable for cables, chokes, junction boxes, and transformers .
• 0.5Kg Black Non-Hardening Sealing Putty: Designed for electrical and cable applications, resistant to oils, water, and mild acids, ideal for industrial atmospheres .
• Black TAC Tack Putty: Weatherproof and reusable, though primarily marketed for general sealing, it can be adapted for cable sealing in non-critical applications .

Usage Tips

• Ensure surfaces are clean and dry before application to maximize adhesion and sealing effectiveness.
• Avoid contamination with dust or debris, which can reduce the putty's insulating properties .
• Mold the putty around the cable or joint to completely fill gaps, ensuring a continuous seal.
• For long-term installations, verify compatibility with the cable jacket material to prevent chemical reactions. Black putty provides a reliable, flexible, and reusable solution for protecting optical cables and electrical components in both industrial and outdoor environments, combining ease of use with strong chemical and moisture resistance.