KATBAK® Ceramic Backing Bar – 13mm Square Concave Achieve X-Ray Quality Root Welds in a Single Pass The KATBAK® Ceramic Backing Bar (13mm Square Concave profile) is a premium ceramic weld backing consumable engineered to support and shield the root pass during single-sided welding. Its concave groove channel controls weld pool penetration, producing consistently smooth, defect-free back beads without the need for back-gouging, grinding, or a second welder on the opposite side of the joint. Manufactured by Gullco International under the trusted KATBAK® brand — an industry-recognized name in welding since 1979 — this ceramic backing bar is built for fabricators, pipe welders, and structural steel professionals who demand reliable, code-quality results on every pass. Key Features 13mm Square Concave Profile – The concave channel shapes and supports the molten weld pool for a uniform, x-ray quality back bead Weld One Side Only – Eliminates the need to flip, gouge, or grind the joint for backside access Deposits More Weld Metal – Root pass and fill can be completed in one continuous pass, improving productivity Pressure-Sensitive Adhesive Backing – Wide, heat-receptive foil tape holds the ceramic firmly in place against the workpiece during welding Non-Toxic Ceramic Material – Safe for shop use with no hazardous fumes from the backing itself Reduces Rework and Rejects – Consistent backing minimizes burn-through, porosity, and root defects Applications Ideal for use with: Manual Metal Arc Welding (MMA/SMAW) Gas Metal Arc Welding (GMAW/MIG) Flux-Cored Arc Welding (FCAW) Submerged Arc Welding (SAW) Commonly used in pipe fabrication, structural steel, pressure vessel manufacturing, shipbuilding, and any application requiring single-side access welding with guaranteed root penetration. Why Choose KATBAK Ceramic Backing? Traditional backing methods often require costly secondary operations like gouging and grinding to clean up the root pass. The KATBAK Ceramic Backing Bar removes that step entirely — saving labor time, consumables, and reducing the risk of weld defects that lead to failed inspections or rework. Specifications Attribute Detail Profile Square, Concave Groove Size 13mm Material Non-toxic ceramic with pressure-sensitive foil backing Compatible Processes MMA, GMAW, FCAW, SAW Brand KATBAK® (Gullco International) Order your KATBAK 13mm Square Concave Ceramic Backing Bar today and get consistent, high-quality root welds with less rework and faster turnaround. A 6.3 mm B 22.2 - 25.4 mm C 25.4 mm D 4 mm E 1.6 mm F 4.8 mm G 11.1 mm
