Made with indium this solder is soft and malleable—even as temperatures approach absolute zero—allowing this solder to form an airtight seal between metal and certain non-metal materials. It’s often used in cryogenic applications, including those with liquid nitrogen. Thanks to its ribbon shape, this solder is easier to use on large, flat areas than wire solder.

This solder has a lower melting point than most solders, making it good for sensitive assemblies, such as semiconductors and electronic components. Unlike commonly used tin-based solders, this solder won’t damage gold plating on circuit boards. It’s also a good conductor of heat and electricity. More durable than standard tin-lead solder, this solder is less likely to crack from repeated temperature swings. It’s low outgassing, so you can also use it in high-vacuum applications.

This indium-based solder can be cold welded, meaning it will bond to itself without heat. You can also use it for step soldering with traditional solders. It does not have a flux core, choose soldering flux to prepare workpieces for this solder.

Leaded solder has greater tensile strength and density than other indium-based solders, giving it a stronger hold.

Lead-free solder is safer to use than leaded solder and helps meet industry regulations.