Insulated aluminum backing tape, or simply called insulated backing tape, has a high-temperature fiberglass insulation strip down the center of the tape. We recommend using our insulated backing tape for sheet metal butt joints and similar applications where you can’t easily add a backing shield gas, and you want a high-quality weld bead profile on the back side.
Insulated backing tapes capture the shield gas as it moves through the root gap, providing a backup shield of argon gas. Additionally, they provide support for the molten weld puddle, which contributes to a uniform and more consistent bead profile.
Insulated aluminum backing tape comes in 2" wide and 4" wide versions.