When I was gainfully employed did quite a bit of stainless piping projects. TIG welding in place with piping up to 12" made back purging problematic. The fitters would use this painted on the back side of the weld prior to fitup. Worked like a charm. May be an alternative to back purging for these types of projects.

Solar Flux


"We live in a time when intelligent people are being silenced so that stupid people won't be offended".