Welding back up paste

Used this for backup since I am not setup to run argon backup....not "sanitary grade"
but better than stainless "sugar" on backside of weld...exhaust worthy I think..     (I have no affiliation with them...)

Interesting. Will have to learn more about this. Thanks.

I have a tin of this and have used it on a lot of exhaust.  Handy. It works. Convenient. Smells like "dirt."

Easier than back-purging, but doesn't leave the weld as pretty as back-purging.

This stuff has been a life saver when I can't back purge. 

Same here. Love that stuff.

I have it too. Can't see the backside of the welds- does this stuff turn to glass?

I guess you could call it that.....why I would not use on intake.....kind of hard to remove