Fiberglass Welding Backing Tape for Structural Steel and Stainless Steel Welding Description:
The fiberglass welding backing tape is designed to support root pass welding and improve back bead formation in demanding welding applications. This fiberglass weld backing tape helps achieve smooth, uniform weld penetration while reducing rework and improving welding efficiency.
Made from heat-resistant fiberglass materials, the weld backing tape for structural steel welding provides reliable support during welding operations and performs well under high temperature conditions. It is widely used in structural steel welding, stainless steel welding, pipeline fabrication, and other precision welding applications.
With customizable sizes and specifications available, this fiberglass backing tape offers a practical and efficient solution for high-quality one-side welding operations.

Fiberglass Weld Backing Tape can improve your welding technique. It can make the bottom welding joints smoother after the welding operation.
Our product is made from two sides of Aluminum tape and high-temperature resistant fibreglass fabric tape. It is very soft, so it can wonderfully fit the bottom of the joints.
It doesn’t need to be customized, because the size can be free cut. And it can be split joint to shaped form. Also, it can be used in a wide way to ensure the nice shape of the weld bead.
Fiberglass Welding Backing Tape Specification:
| Item No. | Size | Service Temperature | ||
| Aluminum width | Fiberglass tape width | Roll length | ||
| FWB29 | 120mm | 29mm | 10m | 550ÂşC |
| 30m | ||||
| FWB 38 | 130mm | 38mm | 10m | |
| 30m | ||||
Fiberglass Welding Backing Tape Using Method:

The fiberglass backing is suitable for structural steel welding, stainless steel welding, and so on.
Suggest weldment root face from 0mm to 1mm; welding gap between 1mm and 3mm.
For Metal Active Gas Welding, the recommended amperage should be from 170A to 190A. So that it can achieve a better welding effect.
The weldment can be removed more easily when it is still warm after welding.
Comparison between Ceramic Welding Backing & Fiberglass Welding Backing Tape:
| Model | Application |
| Ceramic Welding backing | – Steel thickness over 5mm – Steel Structure – Shipyard – Boiler and pressure vessels – Bridge builder |
| Fiberglass Welding Backing Tape | Suitable for thinner materials, Ideal for stainless steel and alloyed metals, sheet, plate, pipes, and vessels |
About ALAND WELDING:
Founded in 2012, BEIJING ALAND WELDING is a professional manufacturer and global supplier of advanced welding equipment and solutions.
We integrate R&D, manufacturing, and international export, delivering high-performance welding machines designed to make welding more efficient, precise, and reliable.

Product Portfolio
Our comprehensive product range includes:
Pulse MIG/MAG Welding Machines
AC/DC TIG Welders
MMA (Stick) Welders
Multi-Function Welding Machines
Plasma Cutting Machines
Submerged Arc Welding Equipment
Laser Welding / Cutting / Cleaning Machines
Complete Welding Accessories and Welding Materials
If you are interested in our products or plan to import fiberglass weld back up tapes and other construction products, please feel free to contact us. Looking forward to long-term cooperation with you.