73585976 - Dow 340 Thermal Grease 14 oz Cartridge

Essential for Welding Machine Maintenance

Dow 340 Heat Sink Compound is a critical maintenance supply for any welding shop or repair technician working on power sources. Welding machines, particularly inverters and heavy-duty transformer-rectifiers, generate significant heat during operation. The internal power components—such as diodes, IGBTs, and rectifiers—rely on aluminum heat sinks to dissipate this heat. When replacing these components or performing deep maintenance, applying a high-quality thermal compound like Dow 340 is mandatory to prevent immediate failure due to overheating.

Protect Your Power Source

The interface between a power transistor and its heat sink is never perfectly flat. Microscopic imperfections can trap air, which acts as a thermal insulator. Dow 340 fills these voids with a thermally conductive silicone material, creating a continuous path for heat to escape. This 14 oz cartridge provides an ample supply for busy repair shops, allowing technicians to service multiple machines without running out. It is the industry standard for ensuring that expensive power blocks run cool and efficient, maintaining the duty cycle and reliability of your welding fleet.

Designed for High-Heat Environments

Welding environments are tough, and the internal temperature of a power source can fluctuate drastically. Dow 340 is formulated to withstand these thermal cycles without migrating, bleeding, or drying out. Its stability ensures that once a component is installed, the thermal connection remains secure for years. It is electrically insulating, which is a vital safety feature when working around high-voltage internal components, ensuring that the compound does not cause short circuits across component legs or to the chassis.

Application Tips

For best results during repair, clean the old compound off both the component and the heat sink using a suitable degreaser. Apply a thin, even layer of Dow 340 to the base of the new component before bolting it down. The pressure from the mounting screws will spread the compound to fill all voids. This simple step is often the difference between a successful repair and a repeat failure.

• Prevents Overheating: Maximizes heat transfer from diodes and IGBTs.
• Long-Lasting: Will not dry out inside the machine.
• Safe to Use: Electrically non-conductive silicone base.
• Shop Standard: 14 oz size fits standard grease guns or can be dispensed manually.