Heat-shrink sleeve 3M SKR/KV3 170/75 for 240–626 mm² cable joints, red

The 3M SKR/KV3 170/75 heat-shrink sleeve in red is designed for insulating and mechanically protecting cable joints on medium- to large‑section power conductors with cross-sections from 240 to 626 mm². The sleeve shrinks when heated to form a compact, conforming barrier around the joint area, providing dielectric insulation and protection against moisture and contaminants. It is intended for industrial, utility and repair applications where reliable electrical continuity and environmental sealing are required.

Advantages

The heat-shrink sleeve delivers uniform thermal shrinkage to ensure tight adhesion to the cable insulation and connectors, reducing voids and improving dielectric performance. Its construction provides mechanical reinforcement at the joint, helping to resist strain and abrasion. The red color enables quick visual identification of jointed sections, and the material formulation is suitable for outdoor and indoor environments subject to moderate temperature and environmental exposure.

Suitable for

• Insulation and sealing of butt joints on power cables with conductor sizes 240–626 mm²
• Field repairs and on-site cable jointing in utilities and industrial plants
• Applications requiring dielectric insulation and protection from moisture and contaminants

Key specifications

• Compatible conductor cross-section range: 240–626 mm²
• Color: red
• Function: heat-shrink insulation sleeve for cable joints
• Performance: provides dielectric insulation and environmental sealing
• Protection: mechanical reinforcement against abrasion and strain

How to use

Prepare cable ends and joint components according to standard cable jointing practices, ensuring surfaces are clean and dry. Position the heat-shrink sleeve over the assembled joint so it fully covers the insulation overlap and connectors. Apply controlled heat uniformly around the sleeve using an appropriate heat source until the material shrinks and conforms tightly to the joint, eliminating air gaps. Allow the sleeve to cool so the cured profile stabilizes before handling or energizing the circuit.

Usage recommendations

Use a calibrated heat source and follow manufacturer or industry guidelines for heating temperature and time to avoid overheating. Verify the sleeve fully conforms to the cable profile and inspect the joint for continuous coverage and absence of voids. For outdoor installations, consider additional mechanical protection if the joint will be exposed to repeated mechanical stress or UV-intensive environments.

3M is the brand for this heat-shrink sleeve, intended for professional cable jointing tasks. Follow local electrical safety rules and cable manufacturer instructions when installing.