Solar Flux review

This is the stuff we were discussing a few days ago . I tried it out just a few minutes ago , and it works as advertised . There is no
sugaring on the back side of the piece of 1 3/4 stainless tube I just butt welded . Not to say the inside weld is smooth , but that's a reflection on my lack of skill with a TIG torch . I followed the directions on the package with one exception , I have no methanol on hand so I used 95% pure ethanol (generic Everclear) as the solvent . It mixed easily without lumps , applied easily and dried quickly . It turns powdery as it dries and is easily wiped from the edges you're welding . Leaves a black glassy coating that they say is easily removed - I didn't try . I give this product 5 stars .
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On 07/12/2021 21:54, Snag wrote:



I've just got the SIF purging flux UK equivalent and it also mentions using washing up liquid and clear varnish as well as methanol to form a paste, their instructions here https://www.weldability-sif.com/media/pdfs/info/FO210050.pdf . I haven't had an opportunity to try it yet.
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On 12/8/2021 11:40 AM, David Billington wrote:




Looking at their instructions it appears this flux is water soluble after welding . That seems to be the major difference . I got the stuff because I'm building an exhaust system for my truck and I didn't want to have to purge with gas . Most of the welding will be on the bench (so to speak) but some joints will have to be welded on the truck . I'm still hoping that I can figure out the MIG for those , but they will still need some shielding on the back side .
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On 12/7/2021 2:54 PM, Snag wrote:



Thank you. I don't actually have any stainless with an open back side to do right now, but I may buy some just to have it on the shelf. Right next to my big bag of Cherry Red powder for case hardening.
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