0446191001 - ESAB Copper Weld Backing Bar

Get Perfect Roots with the ESAB Copper Bar Plus

Every welder knows the frustration of blowing a hole through a root pass, especially when you're trying to get full penetration on a tricky joint. The ESAB Copper Bar Plus is your insurance policy against burn-through. Think of it as a heavy-duty safety net for your weld puddle. By clamping this solid copper bar to the back of your joint, you create a solid foundation that holds the molten metal in place. This allows you to turn up the heat and ensure you're digging deep into the root without worrying about the bottom falling out. It’s the secret weapon for making one-sided welds look like you welded them from both sides.

One of the biggest advantages of using this copper bar is how it handles heat. Copper sucks heat away from steel incredibly fast. This means the bar acts as a "chill block," pulling excess heat out of your base metal. If you are working on thinner materials or stainless steel where warping is a nightmare, this bar helps keep things straight and true. It stops the heat from spreading too far, keeping your heat-affected zone small and your part dimensionally accurate. Plus, because steel weld metal doesn't stick to copper easily, the bar pops right off when you're done, leaving a smooth, clean surface on the backside of your weld.

Forget about messing around with disposable ceramic tape that crumbles or leaves a mess. The ESAB Copper Bar Plus is a reusable tool that belongs in your kit for the long haul. Just clean it up after a job, and it's ready for the next one. Whether you are running a hot MIG pass or setting up for a sub-arc run, this bar gives you the confidence to weld hot and fast. It saves you time on grinding, saves you money on rework, and helps you lay down professional-grade beads every single time.