Thermal conductive materials – Thermal pads

tesa® 58398 – Thermal Conductive Materials & Eko-Tech

Q: Why choose Eko-Tech instead of buying standard rolls?

With our converting, you receive a ready-to-use solution designed for your process, reducing time, waste, and assembly errors.

Q: What converting options are possible?

At Eko-Tech, we can supply it in custom lengths, widths, die-cut shapes, or on spools for automated applications.

Q: What thickness is available?

The tape has a total thickness of 400 µm with a 127 µm liner .

Q: What is the thermal conductivity value?

tesa® 58398 provides 0.65 W/mK in the z-direction.

Thermal conductive materials are essential for modern electronics, ensuring stable performance, extended component life, and safe operation by effectively transferring heat between critical parts. tesa® 58398 is one of the advanced thermally conductive tapes designed to meet these demands.

As Eko-Tech Sp. z o.o. Sp.k., a tesa® Platinum Converter, we provide not only access to premium materials but also the technical expertise to design, modify, and deliver solutions tailored to your needs. Serving the Polish and Eastern European market, we ensure local support, quick delivery, and full integration into your production processes.

Applications of tesa® 58398

The tape is designed for thermal management in electronics and electrical systems, including:

Battery module cooling plates – efficient heat transfer for extended battery life
Power electronics units – stabilising heat-sensitive components
FPC and PCB assembly – reliable bonding with thermal conductivity
LED systems – improving heat dissipation and performance

Need efficient heat management for your electronics?

Get custom-engineered solutions with tesa® 58398 – converted locally by Eko-Tech, your trusted tesa® Platinum Converter in Poland. Request Your Custom Quote Today

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Product Overview: tesa® 58398

tesa® 58398 is a 400 µm white acrylic-based thermally conductive tape. It enables efficient heat transfer between heat sources and heat sinks, making it ideal for demanding electronic applications. Key Features:

Acrylic adhesive with thermal conductivity (0.65 W/mK)
Excellent adhesion to polar substrates (steel, aluminium, etc.)
High electrical insulation (breakdown voltage: 6 kV)
Reliable performance under extreme temperatures (from -40 °C up to 150 °C short-term)
Flame retardant (UL94 V2 rating)

Converter Benefits – Why Partner with Eko-Tech?

Choosing Eko-Tech as your partner means working with a proven and reliable tesa® Platinum Converter. Our expertise ensures:

Local converting capabilities for fast and flexible delivery
Proven reliability with a track record of supporting leading manufacturers
Custom solutions adapted to your production processes and applications
Technical support backed by close collaboration with tesa® engineers

With us, you don’t just buy material – you get a solution designed to perform and fit your exact needs.

Converting Services for tesa® 58398

At Eko-Tech, converting is the key to unlocking the full potential of tesa® 58398. We can provide:

Rewinding from jumbo rolls to individual-length reels
Slitting to precise widths for your process needs
Die & Kiss cutting for customised shapes and application-ready parts
Cross-wound spools for automated tape application in high-volume production

Every conversion step is designed to increase efficiency, reduce waste, and optimise performance in your application.

Made in Poland

Although the base material is manufactured by tesa®, Eko-Tech adds value through advanced converting. That means each converted product can proudly carry the “Made in Poland” label – tailored for your requirements and delivered with full local support across Poland and Eastern Europe.

Product Construction:

Adhesive Type acrylic
Backing material none
Color white
Color of liner white
Liner Type PE-coated paper
Thickness of liner 127 µm
Total thickness 400 µm
Flame retardancy V2
Release of liner easy
Temperature resistance short term 150 °C

Thermal conductivity z-direction 0.65 W/mK
Temperature resistance (-40°C) very good
Hardness – Shore 00 74 STK
Temperature resistance (125°C) very good
Breakdown voltage 6 KV
Density 1.65 g/cm³
Adhesion to Aluminium (after 3 days) 6.7 N/cm
Adhesion to Steel (initial) 3 N/cm
Adhesion to Steel (20min @ RT, 90°) 3 N/cm