We started using this horrible ceramic back up tape to weld 316 stainless 12 to 10ga head/shell seams at work as opposed to the old fashion way of welding inside, back grinding/short arc outside for 100% penetration. Most of the finishes need to be sanatery on the inside and this tape really makes the weld rock hard, grinders hate it. Does anybody have any alternitive products or methods that may help this process?