KATBAK® Ceramic Weld Backing Bar – Stud Welding & Root Pass Backing Achieve X-ray quality welds in a single pass with genuine Gullco KATBAK® ceramic backing. The KATBAK® Ceramic Backing Bar is a premium weld backing material engineered to support root passes and eliminate the need for back-gouging, grinding, or double-sided welding. Designed for stud welding, MIG, TIG, and submerged arc applications, this ceramic backing bar allows fabricators to weld from one side only while achieving consistent, defect-free root beads — even on critical structural and pressure-vessel joints. Key Features X-Ray Quality Root Beads – Produces clean, uniform back beads that meet strict weld inspection standards, reducing rework and rejection rates. Weld One Side Only – Eliminates the need for back-gouging or flipping the workpiece, cutting labor time and fabrication costs. Higher Deposition in a Single Pass – Allows more weld metal to be deposited per pass, so root and fill can often be completed together. Wider Heat-Receptive Adhesive Foil – A pressure-sensitive backing foil bonds securely to the workpiece and withstands the heat of the welding arc without lifting or shifting. Non-Toxic, Moisture-Resistant Packaging – Individually sealed in plastic to protect against moisture absorption, ensuring consistent ceramic performance at the time of use. Wide Size Range – Available from 1/4" (6.3mm) up to 6" (152.4mm), with custom sizes and radiused/curved profiles available for cylindrical or pipe welding. Common Applications Structural steel fabrication Pipe and pressure vessel welding Shipbuilding and heavy plate welding Stud welding root support MIG welding with solid or metal-cored wire TIG welding root pass support Why Choose KATBAK® Ceramic Backing Manufactured and distributed by Gullco International, KATBAK® is a trusted name in ceramic weld backing across industrial and structural welding sectors. By supporting the weld pool from beneath the joint, it prevents burn-through, controls bead shape, and delivers a smooth, code-quality root pass without costly post-weld gouging or grinding — saving time, consumables, and labor on every joint. Available in standard and custom configurations. Contact us for pricing, bulk orders, and technical spec sheets. QWS can provide you with a KATBAK ceramic weld backing to meet your needs. If you don’t see the ceramic you need, please contact QWS to discuss your specific requirement. Impart X-ray Quality Back Beads On Root Pass Weld One Side Only Deposit More Weld Metal Root Weld And Fill In One Pass Eliminate Defects And Rework Eliminate Costly Unnecessary Gouging And Grinding Sizes 1/4” (6.3 mm) to 6” (152.4 mm)
