Dow announced the global launch of DOWSIL™ TC-3120 Thermal Gel, an advanced silicone-based thermal interface material engineered to improve heat dissipation while maintaining optical-grade cleanliness in high-performance electronic applications. With a thermal conductivity of approximately 12 W/m·K—the highest among Dow’s commercially available silicone gels—the new material addresses growing thermal management challenges in next-generation electronics and optical communication systems.
Designed for High-Speed Data and Advanced Electronics
As data centers, telecommunications networks, and AI-driven technologies continue to evolve, electronic components are generating increasingly higher levels of heat. To address this challenge, DOWSIL™ TC-3120 Thermal Gel is specifically designed for demanding applications such as 800G and 1.6T optical modules, optical transceivers, telecommunications equipment, electronic module assemblies, autonomous vehicles, automotive electronic controllers and high-speed computing and data-processing systems. By efficiently transferring heat away from critical components, the material helps enhance system reliability and operational performance.
Optical-Grade Cleanliness Enhances Reliability
In addition to exceptional thermal performance, DOWSIL™ TC-3120 Thermal Gel offers outstanding optical cleanliness. The material is engineered to minimize oil bleeding and condensed outgassing—two common sources of contamination that can compromise the performance of sensitive optical and electronic devices. As a result, manufacturers can significantly reduce contamination risks in components such as photodiodes, optical fibers and precision lenses. This feature is particularly important in optical communication systems, where even minor contamination can negatively impact signal quality and long-term reliability.
Easy Processing and Efficient Manufacturing
Despite its ultra-high thermal conductivity and heavy loading of thermally conductive fillers, DOWSIL™ TC-3120 Thermal Gel remains highly dispensable and easy to process. Supplied as a flowable paste, the material can be compressed to a minimum bondline thickness of 200 microns, enabling efficient heat transfer between components. Furthermore, it supports controlled extrusion rates and allows manufacturers to achieve consistent bondline thicknesses during production. The one-part formulation is also reworkable, fills large gaps effectively, and offers accelerated curing when heat is applied, helping improve manufacturing efficiency.
Minimizing Oil Bleed for Improved Performance
Many ultra-high thermal conductivity materials suffer from excessive silicone oil release, which can interfere with adhesion, contaminate sensitive components, and ultimately lead to optical failures. However, DOWSIL™ TC-3120 Thermal Gel significantly reduces oil bleeding. Consequently, manufacturers can improve product reliability while minimizing contamination-related risks throughout the lifecycle of electronic and optical devices.
Engineered for Harsh Operating Conditions
Beyond thermal performance, the new gel is designed to withstand challenging environmental conditions. It demonstrates strong resistance to high temperatures and humidity, mechanical shock and vibration, repeated thermal cycling. The material forms a stable thermal interface that resists cracking and remains securely in place even under mechanical stress. Moreover, it prevents slumping in vertically oriented modules such as optical transceivers, ensuring long-term performance stability. As per the press release, Dow recommends the material for module-to-heatsink interfaces, particularly in applications involving uneven surfaces or tolerance stack-ups.
