By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

JB Weld

How good is it?

All Topics | Latest Posts

Search for:  in Thread Title in  
Alan Hilton18/11/2019 18:03:29
109 forum posts

I fixed a 90 size heli engine with a hole in the crankcase with JB .It was for a mate who deals in rubbish and I didn’t think it stood any chance of working .It was compleatly successful and has lasted for many flights so far

Alan

cymaz18/11/2019 18:05:01
avatar
8812 forum posts
1195 photos

You’ve all convinced me. JB Weld on order yes

Foxfan18/11/2019 18:15:19
avatar
848 forum posts
6 photos

Just make sure you mix the Hell out of it and when you think you're done, mix it some more! Like all epoxies in fact, but that's the only safety measure for getting a great result. The beauty of one black one white resin is that mixing means a nice even grey is your best guide.

Best of luck.

Martin

cymaz18/11/2019 18:16:07
avatar
8812 forum posts
1195 photos

Will report back when done

flight118/11/2019 20:14:05
avatar
630 forum posts
33 photos

JB weld will work just remember to mix accurately and well and where you want it stuck lightly key the surface and make sure it grease and dust free.

used it a lot on that Hanriot of mine cabines and undercarriage parts takes a week in a warm place to competly cure to full strength ( ie 90 odd percent on a day rest over a few days

Foxfan18/11/2019 21:24:13
avatar
848 forum posts
6 photos

Like epoxies generally it will react well to a gentle heat. A desk lamp with a proper bulb, not one of those silly spaghetti things. 30 watts in an Anglepoise will do nicely. Works a treat on Milliput too. Milliput won't go fully hard without some heat.

Martin

Geoff Sleath18/11/2019 21:48:42
avatar
3488 forum posts
319 photos
Posted by Foxfan on 18/11/2019 18:15:19:

Just make sure you mix the Hell out of it and when you think you're done, mix it some more! Like all epoxies in fact, but that's the only safety measure for getting a great result. The beauty of one black one white resin is that mixing means a nice even grey is your best guide.

Best of luck.

Martin

I wish all epoxies were like that ie with different colours for the adhesive and the hardener. First it makes it easier to know when it's thoroughly mixed and, second, it saves confusion when you can't remember if you've squeezed out hardener or adhesive. 2 squirts of either rather than one of each doesn't make for a good result

JB Weld is certainly very slow to cur properly. Well over a day IIRC. Surprised Cymaz has had to send off for it because it's available over the counter in our local car spares shops - and in our small market town, not in a city.

Geoff

Foxfan18/11/2019 23:13:05
avatar
848 forum posts
6 photos

Indeed, a coloured second half would help on some epoxies. JBWeld off the 'net is probably, like most things, much cheaper. I paid over £4 for a tube of Evo-Stik from a shop (the only one in a large town) because I had to have some to finish a job, but my wife then got me 5 packs for the equivalent of £2-50 a tube off ebay. That is why shops are dying. I know the online shops have no overheads, but £4 for a tube is stupid. If it was £3 I would stick with the shop, but £4? No, too much extra.

Give it a little heat. I put some on a model car last night, put it under the lamp today and it's hard as rock now. brass on plastic.

M

PatMc19/11/2019 00:02:00
avatar
4231 forum posts
521 photos

Would JB Weld be suitable as an adhesive sticking ply formers to a "blown" plastic fuselage ?
Not glass & epoxy/polyester resin but a similar type of plastic as used for the Phoenix glider etc.

Foxfan19/11/2019 00:46:55
avatar
848 forum posts
6 photos

The only thing it won't stick is polythene, like everything else. If your fuselage is styrene or more likely ABS, give it a good scratch up for a key and you'll be fine.

If it can stick the magnesium sump of a Maserati 4.5Litre V8 in a Cooper Racing car it can mend a toy aeroplane!

Martin

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Support Our Partners
Pepe Aircraft
Cambridge Gliding Club
Slec
Gliders Distribution
electricwingman 2017
CML
Wings & Wheels 2019
Sarik
Advertise With Us
Do you use a throttle kill switch?
Q: This refers to electric-powered models but do you use a throttle kill switch?

 Yes
 No
 Sometimes
 Rarely

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us