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Jul 16, 2026

Gap Filler, Pads, Spacers, Soft and Ultra-Soft Gel, Silicone-Free

Elastic, silicone-free gap fillers are made of a silicone-free, resin-based thermoplastic elastomer (TPE) and ensure thermal contact between the component and the heat sink by compensating for small, medium, and large gaps, as well as cumulative tolerances between the hotspot and the heat sink, depending on the assembly. Silicone-free gap-filler pads are used in applications where silicones cannot be used due to application-specific requirements.

Thanks to advanced composite technology, silicone-free, soft elastomers offer very good to very high thermal conductivity combined with excellent dielectric strength and high heat resistance. They exhibit no low-molecular-weight siloxane volatility and very low outgassing rates, thereby preventing electrical contact issues or contamination risks. The materials are soft, flexible, and exhibit good recovery properties with excellent compressibility.

Our portfolio includes several high-performance, highly thermally conductive silicone-free elastomers with thermal conductivities ranging from 2.5 to 17.0 W/m·K. The products are soft, compressible, and mechanically robust. They are also characterized by low density. Material thicknesses ranging from 0.5 to 10.0 mm are available; other thicknesses are available upon request.

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