cymaz Posted September 21, 2020 Share Posted September 21, 2020 I’m sticking some K+S profiles to bent undercarriage wire. I have a couple of JB Weld packs handy. I was wondering how to thin the JB down enough to get it to flow into the profile. After some reading up, I understand that acetone will do the job. After experimenting I’ve also learned that Solarlac thinner has the same effect. This morning I’ve mixed up some JB and thinned with Solarlac thinners, placed it on a scrap of aluminium and inserted a short length of piano wire. After work, I will see what’s happening Edited By cymaz on 21/09/2020 06:51:35 Quote Link to comment Share on other sites More sharing options...
Nigel R Posted September 21, 2020 Share Posted September 21, 2020 solarlac states you can use acetone for thinning or brush cleaning so the branded thinners must be a similar chemical? Quote Link to comment Share on other sites More sharing options...
Subalib Posted September 21, 2020 Share Posted September 21, 2020 I warm it with a heat gun. It makes it flow well and helps kick off the setting process. Quote Link to comment Share on other sites More sharing options...
jrman Posted September 21, 2020 Share Posted September 21, 2020 +1 for heating. Quote Link to comment Share on other sites More sharing options...
Robert Welford Posted September 21, 2020 Share Posted September 21, 2020 Another +1 for heating with heat gun. Quote Link to comment Share on other sites More sharing options...
Rob Ashley Posted September 21, 2020 Share Posted September 21, 2020 Talk about a timely post - thanks Cymaz.. I am just about start using JB weld to glue my 1/4 scale SE5a exhaust brackets together and was wondering the same thing... I had considered soldering but holding all the parts together while trying to get the iron and solder in the right place seemed fraught with difficulties - now some JB weld and a heat gun to the rescue.... Thanks all Rob Quote Link to comment Share on other sites More sharing options...
cymaz Posted September 21, 2020 Author Share Posted September 21, 2020 Heat, never thought of that. I know it's good for thinning epoxy. Will report back with the results Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 21, 2020 Share Posted September 21, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Rob Ashley Posted September 21, 2020 Share Posted September 21, 2020 Posted by Doc Marten on 21/09/2020 10:48:03: I stopped using JB Weld not long ago. I was recommended to use it for a minor motorbike repair to the sensor magnet for the speedo, it fell apart. I tried again fairly recently for fixing a captive nut to the end of a ply engine mount, the nut came away. I was really disappointed by it. Hi Doc, Very interesting post. I built an aluminium exhaust system for a glow engine that is held together entirely with JB weld. It has held firm for about 7 yrs so far and is much quieter than the 'off the shelf' ones. I have recommended JB weld to others for such purposes, although I have not used in on wood at all. Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 21, 2020 Share Posted September 21, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Rob Ashley Posted September 21, 2020 Share Posted September 21, 2020 Did you heat the nut with a flame? Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 21, 2020 Share Posted September 21, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Rob Ashley Posted September 21, 2020 Share Posted September 21, 2020 Ah, you may have exceeded the temp limits which might be why it fell apart.. I use the higher temperature version on my exhausts and all seems fine for me. Strange we have had two polar opposite experiences. Quote Link to comment Share on other sites More sharing options...
cymaz Posted September 21, 2020 Author Share Posted September 21, 2020 The mix I made up before I went to work ( 7am ) using Solarlac thinners has not set. It’s just gone like chewing gum. Will report on the heat application method in the near future.....well as soon as I’ve had tea and it’s cured, which maybe tomorrow Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 21, 2020 Share Posted September 21, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Ben B Posted September 21, 2020 Share Posted September 21, 2020 Posted by Doc Marten on 21/09/2020 10:48:03: I stopped using JB Weld not long ago. I was recommended to use it for a minor motorbike repair to the sensor magnet for the speedo, it fell apart. I tried again fairly recently for fixing a captive nut to the end of a ply engine mount, the nut came away. I was really disappointed by it. What prep did you do on the nut? I epoxied together aliminium once- it ended up as a strong bond but only if surface was prepared first. Without it, it was useless. Quote Link to comment Share on other sites More sharing options...
Gary Murphy 1 Posted September 21, 2020 Share Posted September 21, 2020 Whats that epoxy "something" Metal???? I used it years ago to join the float bowl back on to the broken main section on a motorcycle, It went rock hard ,could file it down to smooth finish and held like crazy. Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 21, 2020 Share Posted September 21, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
flight1 Posted September 21, 2020 Share Posted September 21, 2020 Don't thin jb weld it will change the chemical adhesion abilities to metal and weaken it a lot . Just plonk the two sealed tubes in a tub of hot water for a bit (15 min) then mix well ( as with all epoxys) and it will be quite runny more than enough to run into the metal tube. + remember to clean/ degrease the metal and abrade the surfaces to be stuck and it will stick well. Quote Link to comment Share on other sites More sharing options...
cymaz Posted September 22, 2020 Author Share Posted September 22, 2020 As Flight 1 and others have said, heat works a treat. That’s the way to go. Also get the metal clean. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted September 22, 2020 Share Posted September 22, 2020 Cymaz . Why don't you use Gorilla glue to fill the profiles then top and tail the ends with some epoxy ? Mix the Gorilla glue with a tiny drop of water first and it will foam up . Insert it with a syringe, working time before it starts foaming will be about 3 to 4 Mon so get all parts ready first. That will be lighter and easier to use than JB weld and more than strong enough for the job . Abrade the U/C wire first and it will grip really well. Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 22, 2020 Share Posted September 22, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
J D 8 Posted September 22, 2020 Share Posted September 22, 2020 Another fan of JB WELD, and not just for model work. Had good results for fixies around the farm with it. Quote Link to comment Share on other sites More sharing options...
Former Member Posted September 22, 2020 Share Posted September 22, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
conrad taggart Posted September 22, 2020 Share Posted September 22, 2020 Very good guide here - with JB weld tested too (the heat extreme and original version) The Ultimate Epoxy Competition--Which Epoxy is the Best? **LINK** Edited By conrad taggart on 22/09/2020 22:59:28 Quote Link to comment Share on other sites More sharing options...
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