Medium wall

Medium Wall Heat Shrink Tubing (MWTM Series)

Reliable Cable Insulation and Sealing Solutions

Manufactured by TE Connectivity (Raychem) and CommScope — Supplied in Ireland by Cable Accessories Ltd

Versatile Protection for Low and Medium Voltage Cables

Cable Accessories Ltd stocks and supplies a range of medium-wall heat shrink tubing, including TE Connectivity (Raychem) / CommScope MWTM.

These versatile, adhesive-lined heat shrink tubes are designed for insulation, sealing, and mechanical protection on low- and medium-voltage cables, delivering proven performance in Ireland’s telecom, utility, and industrial markets.

With over 25 years of experience supporting Irish contractors and operators, we provide local stock, technical advice, and custom kitting services for all heat shrink and sealing applications.

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Whether you need product advice, a custom solution, or just have a quick question — we’re here to help and happy to chat!

Overview

MWTM is a medium-wall, cross-linked polyolefin tubing engineered for use on low-voltage accessories and medium-voltage joints or terminations.

When heated, the tubing shrinks tightly around cables and components, while the inner hot-melt adhesive layer forms a watertight seal even on irregular surfaces.

The MWTM combines mechanical strength, dielectric performance, and ease of installation, offering long-term reliability in underground, outdoor, or offshore environments.

Key Features

High mechanical strength and electrical insulation for low- and medium-voltage use
3:1 shrink ratio — fits a wide range of cable diameters
UV- and weather-resistant, halogen-free, and non-corrosive
Hot-melt adhesive version for watertight sealing; uncoated version for re-jacketing
Unlimited shelf life under normal storage conditions
RoHS and REACH compliant
Approved for offshore and outdoor installations

Primary insulation and re-jacketing of low-voltage cable joints
Sealing and corrosion protection on power and telecom cables
Jacket restoration and sheath repair
Mechanical and electrical protection for underground and overhead cables

Suitable for industrial, marine, and utility applications

Property	Typical Value
Material	Cross-linked polyolefin with optional hot-melt sealant
Shrink Ratio	> 3:1
Colour	Black (standard)
Operating Temperature	–40 °C to +100 °C
Installation Temperature	≥ 120 °C
Dielectric Strength	≥ 10 kV/mm
Tensile Strength	≥ 12 MPa
Elongation at Break	≥ 350%
UV Resistance	Stabilised against weathering
Chemical Resistance	Resistant to oils, fuels, and solvents
Water Absorption	≤ 0.25%
Shelf Life	Unlimited under normal storage conditions

For available sizes please get in touch with us.

Supplied in 1 and 1.5 m lengths.

Authorised distributor for TE Connectivity (Raychem) and CommScope
Local stock and fast delivery throughout Ireland
Technical support for selection and sizing
Proven reliability with Irish utilities and network operators

We help you choose the right shrink tubing for every application — ensuring safe, reliable cable protection.

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Submit a contact form to discuss your closure requirements or request documentation.

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