AFBT-2.5 - Fiback 2.5-Inch Fiberglass Welding Backing Tape 600A

Get the Perfect Root Pass Without the Hassle

Struggling with back purging or trying to bridge a gap without blowing through? The Aquasol Fiback AFBT-2.5 Welding Backing Tape is your best friend for getting that perfect root pass on open root joints. This 2.5-inch wide tape features a durable fiberglass center strip that catches and supports your molten metal, allowing you to weld from one side with confidence. Whether you are TIG welding stainless pipe or MIG welding heavy plate, this tape handles the heat—rated for up to 600 Amps—so you can focus on your puddle control rather than worrying about what's happening on the backside.

The setup is incredibly fast. Just peel and stick the aluminum tape over the back of the joint. The adhesive is strong and heat-resistant up to 500°F, meaning it won't curl or peel off mid-weld. The fiberglass strip in the center can take over 1,000°F, ensuring it won't melt away under your arc. This creates a clean, smooth bead on the backside of your weld, often eliminating the need for back grinding or a second pass from the inside. It is a massive time-saver for tank work, shipbuilding, and custom fabrication where you can't easily access the back of the weld.

Forget about setting up complex purge dams or wasting tanks of argon for simple backing needs. With a 41-foot roll in your toolbox, you are ready to tackle fit-up gaps and one-sided welds efficiently. It works great with Stick, MIG, and TIG, giving you the versatility you need for various jobs. Clean up your workflow and improve your weld quality with Fiback.