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 .
--
Snag
Let's Go Brandon !

On 07/12/2021 21:54, Snag wrote:
>   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 .

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.

On 12/8/2021 11:40 AM, David Billington wrote:
> On 07/12/2021 21:54, Snag wrote:
>>   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 .
>
> 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.
>

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 .
--
Snag
Let's Go Brandon !