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FD37 Putty Liquid Gap filler Material for thermal interface
A blue circle is filled with evenly spaced horizontal black lines, creating a striped pattern reminiscent of LED modules. The lines make the blue color appear as alternating light and dark blue horizontal stripes within the circle against a white background.

FD37 – Gap Filler Putty

Liquid non-hardening silicone gel with heat conduction

FD37 is a single part dispensable material designed with automation and vertical stability in mind.

FD37 is ideal for applications that can benefit from automation, and allows minimization of pressure in applications with gap variability.

Thal Article Number: FD37

Performance Materials: Gap Filler Putty

FD37 – Gap Filler Putty

In addition to providing application flexibility and variable gap adaption, FD37 will exert minimum stress on your component while maintaining interface contact to maximize thermal transfer.

Ordering Example

Very nice to work with. This is exactly what we were looking for for our project!


FD37 – Gap Filler Putty specifications

Properties Unit FD37
Base material
Ceramic and silicone gel
Thermal conductivity
Operating temperature
-40 to 150
Dielectric breakdown
Dielectric constant
@ 1MHZ
Volume resistivity
Flow rate (75cc taper tip, 0.125” orifice, 40PSI
Outgassing TML ( weight % )
Outgassing CVCM ( weight % )
Minimum bond line thickness
Flame rating
Standard packaging
cc (fill volume cc)
75(56), 180(159), 360(326), 300(601), 1 gallon(4110) and 2 gallon(6230)
Performance Materials: Gap Filler Putty

Interested in FD37 – Gap Filler Putty?

Thal Technologies, located in Almere, has been a pioneer in thermal management and LED lighting solutions for over two decades. Our commitment to innovation and excellence drives us to deliver top-tier thermally conductive and electrically insulating materials across a spectrum of electronics applications.

As industry leaders, we excel at tackling complex challenges in thermal management. Our comprehensive approach encompasses consultation, design, assembly, and manufacturing, ensuring that every solution is not only effective but also seamlessly integrated.

At Thal Technologies, we understand the critical importance of precision and reliability. Our tailored solutions are designed to enhance performance and efficiency, making us the partner of choice for businesses seeking cutting-edge thermal management and lighting solutions.

Request a quote or come visit us in Almere, the Netherlands. The coffee is already brewing! We look forward to discussing how we can assist with your needs.
Marko Widman Thal Technologies
Marko Widman
Office Sales T.I.M.
Frequently Asked Questions

FD37 – Gap Filler Putty frequently asked questions

Welcome to the FAQ section for Thal Technologies’ Thermal Interface Materials. Here, you’ll find answers to the most commonly asked questions about our high-performance thermal solutions. Whether you’re seeking detailed information about our product offerings, customization capabilities, or technical support, this section is designed to provide you with the information you need. If your question isn’t addressed here, please feel free to contact us directly. Our team of experts is always ready to assist you in finding the best thermal management solutions for your specific applications.

We offer a wide range of thermal interface materials, including thermal tapes, gels, gap fillers, liquid gap fillers, adhesives, pastes, phase change materials, and graphite films. Each type is designed to enhance thermal conductivity and electrical insulation. Please refer to our specific product pages for more information or talk to one of our experts. Also, feel free to request a free sample or sample box. 

Yes, we specialize in customizing thermal interface materials to meet your unique specifications. Our team can tailor materials to any shape or form required and adjust formulations based on your specific needs.

Our thermal interface materials are used in various industries, including power electronics, IoT & sensing, aviation, automotive, energy, and LED lighting.

We adhere to strict quality control processes and comply with international standards such as ISO 9001. Our materials undergo rigorous testing to ensure they meet the highest performance and reliability standards.

Yes, we provide rapid prototyping services to quickly develop and test custom thermal interface materials, allowing for efficient iterations and adjustments based on your feedback.

Absolutely. We can combine, tweak, and customize materials to meet specific client requirements, ensuring the final product perfectly aligns with your application needs.

You can request a custom solution by contacting us via email at or by phone at +31 (0)36 202 60 60. Our team will work closely with you to understand your needs and develop a tailored solution.

Our thermal interface materials provide enhanced thermal conductivity, electrical insulation, and reliability. They are designed to improve the performance and efficiency of your electronic systems.

Yes, we offer ongoing support to ensure your thermal interface materials continue to perform optimally. Our team is always available to provide technical assistance and address any issues that may arise. 


For further inquiries or to discuss your specific thermal interface material needs, please contact us at or +31 (0)36 202 60 60.