The innovative Dowsil TC-4026 is a two component, 1 to 1 mix ratio, thermally conductive dispensable pad. It is suitable as a thermal interface material used for cooling electronic devices in LED lamps luminaries, consumer, and automotive applications. Dow Corning TC-4026 can be screen printed or dispensed into a variety of shapes. The dispensable pad is formulated to replace traditional fabricated pads and is capable of printing smaller shapes and sizes.

Dowsil TC-4026 Dispensable Thermal Pad is supplied as two-part liquid component kits. Once mixed together thoroughly, it cures into a blue flexible elastomer suitable to protect electronics. Viscosity is 70,000 Cp and specific gravity of the cured material is 2.8 gm-cm³. Cure time is approximately 24 hours at room temperature and working time is 4 hours. The product can be heat cured to speed up the process. At 40°C cure time is 145 minutes, at 100°C, cure time is 15 minutes. TC-4026 requires no post-cure and can be placed in service right away at operating temperatures of -45 to 200°C. Tensile strength is 24 psi, elongation is 200% and dielectric strength is 451 volts/mil.
Glass beads are added to help control the thickness and this product has a lower cost of ownership compared to fabricated pads. This material is designed to be applied by various methods including screen printing, stencil printing and automated dispensing. For more information on the best method for dispensing Dowsil TC-4026, ask an expert from Krayden.

Dispensable thermal pads exhibit minor polymer separation during transportation. Recommendations for re-homogenization can be found in the application guides. Cure reaction begins with the mixing process. Increase in viscosity followed by gelation is will be an obvious indication of the material curing. Dowsil TC-4026 Dispensable Thermal Pad is resistant to minimal solvent exposure. It is recommended to avoid solvent exposure altogether. This product is neither tested nor deemed suitable for medical and pharmaceutical uses.

Dowsil TC-4026 is an innovative dispensable thermal pad used as thermal management material allowing for efficient operation and better reliability over the life of devices. Tell us about your design and performance challenges and allow Krayden to find the best solution. For more information on product sizing, application or cure times, contact a Krayden Technical Representative. More information can be found on the Dowsil TC-4026 Technical Data Sheet.