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  • #25463
    michael howarth 1
    Participant
      @michaelhowarth1

      Are there differing qualities

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      #313905
      michael howarth 1
      Participant
        @michaelhowarth1

        I know that fast and slow curing varieties are available but aside from that, is there any real difference in the quality/performance of epoxy resin adhesives. Putting it bluntly, is the stuff from the pound shop significantly different from the often much more expensive branded varieties.

        Mick

        #313918
        not done it yet
        Participant
          @notdoneityet

          Yes, of course. Temperature range in use is just one of them.

          #313919
          Massimo Dalmonte
          Participant
            @massimodalmonte45801

            In general, the slower the cure, the better the qualities of the final result ( I had some 5 minute glue from a reputed brand that cured like some kind of gum, other were better) and a longer curing time allows for adjustments.

            If you are thinking of epoxy for wood joints, this test:

            **LINK**

            gives food for thought.

            Cheers,

            Massimo

            #313922
            Hacksaw
            Participant
              @hacksaw

              . Today , i built a "shoe " on a injured hoof with urethane " Vetec Superfast ", 30 seconds cure , not epoxy I know but by God has it adhered ….!!!! Impressed .

              Expensive ? £38 a tube..enough to do 2 feet.. so not too bad for this sort job

              Here's the product , I'm already thinking of other uses for it , and looking to see who actually makes it , as if its " for horses " you pay double !!! I bet Loctite or 3 M make it

               

               

              Dohh..link wont go blue !

              Edited By Hacksaw on 25/08/2017 17:37:29

              Edited By Hacksaw on 25/08/2017 17:38:46

              #313923
              SillyOldDuffer
              Moderator
                @sillyoldduffer

                I think the answer to that is 'maybe'. Epoxy has been around a long time and the chemistry of most products on the market is well understood. There's no particular reason why generic products cannot be made and sold without brand-name premium prices. Of course it may not be the latest gee-whiz formulation. Another source of good quality epoxy is surplus stock and production overruns. Provided it was stored properly and is stiil in date, it should be OK. On the downside, how careful would a Poundshop be buying and selling Epoxy? Not too smart I feel, but probably not much worse than a DIY chain. If quality really matters you should buy from a professional vendor who will fully support the product.

                I've not had any problem with pound shop super glue, which I usually buy because at the rate I use it, most glue, cheap or expensive, goes off in the tube. I've only used Poundshop epoxy once and it was fine. Possibly I was lucky.

                With glue and epoxy, what made the biggest difference to me was rigorously following the instructions, not where I bought it.

                Dave

                Edited By SillyOldDuffer on 25/08/2017 17:38:17

                #313924
                Neil Wyatt
                Moderator
                  @neilwyatt
                  Posted by Hacksaw on 25/08/2017 17:36:46:

                  . Today , i built a "shoe " on a injured hoof with urethane " Vetec Superfast ", 30 seconds cure , not epoxy I know but by God has it adhered ….!!!! Impressed .

                  Expensive ? £38 a tube..enough to do 2 feet.. so not too bad for this sort job

                  If you were a Vet not a Farrier you could put £200 markup on that – per foot!

                  Neil

                  #313925
                  Neil Wyatt
                  Moderator
                    @neilwyatt

                    Some poundshop epoxy is awful, you could say it's poxy, and smells completely different.

                    Many 'own brand' versions are pretty good, but I must admit I (and I'm a tightwad) like Araldite and JB weld when I want to be sure of a good, long-lasting, result.

                    Neil

                    #313926
                    Hacksaw
                    Participant
                      @hacksaw
                      Posted by Neil Wyatt on 25/08/2017 17:58:57:

                      Posted by Hacksaw on 25/08/2017 17:36:46:

                      . Today , i built a "shoe " on a injured hoof with urethane " Vetec Superfast ", 30 seconds cure , not epoxy I know but by God has it adhered ….!!!! Impressed .

                      Expensive ? £38 a tube..enough to do 2 feet.. so not too bad for this sort job

                      If you were a Vet not a Farrier you could put £200 markup on that – per foot!

                      Neil

                      Sadly it was my daughters own horse ..so i had to swallow the cost..bloody horses, bloody kidssad Is it 3M 0474 repackaged I wonder

                      #313927
                      Hacksaw
                      Participant
                        @hacksaw

                        No Nonsense superglue from Screwfix is mighty powerful and in cheap big bottles !

                        #313941
                        the artfull-codger
                        Participant
                          @theartfull-codger

                          A Man after my own heart Neil, "frugal" with everything, I like slow cure araldite & jb weld which I think is stronger, you can use it as an adhesive as well as building up parts, it has an indefinite shelf life & it can make an amateur backyard caster into a professional foundryman!! he he.

                          #313944
                          Rik Shaw
                          Participant
                            @rikshaw

                            On the subject of indefinite shelf left, I have a small bottle of Loctite which has a "use by" date something like six years ago but is still very usable. It was used by an aerospace company until it came to me after it reached its expiry date. >>

                            I quite like the idea of a high flying hand me down keeping my parts intact – ooer missus!>>

                            Rik>>

                            #313963
                            Danny M2Z
                            Participant
                              @dannym2z

                              I have tried many types of epoxy adhesives over the years and came to the same conclusion as Neil and the artfull-codger.

                              Cured 5 minute type epoxy's seem to go soft and yellow after a few years of service (model aircraft use) but decent 24 hour epoxy (eg, Araldite) cured joints are still as tough as the day that they were applied 20+ years ago.

                              Correct mixing ratios and thorough consolidation are very important.

                              There are many varieties so pick the the most suitable type for the job. Here is a linky to one of my favourite brands although one has to hunt around for a supplier **LINK**

                              This grade has been very useful around my workshop btw **LINK**

                              * Danny M *

                              Edited By Danny M2Z on 26/08/2017 02:53:42

                              #313964
                              Nick_G
                              Participant
                                @nick_g

                                .

                                Ahhhhh. – JB weld, Isopan 38, thick pint and loctite. ………….. My very best friends. smileyblush

                                Nick

                                #313980
                                Gordon W
                                Participant
                                  @gordonw

                                  For small jobs that don't matter much I've been buying the tiny tubes in packs of 4 from poundshops. Seems to work well and minimal waste. Still buy the correct stuff for engineering jobs tho'.

                                  #314012
                                  Ian S C
                                  Participant
                                    @iansc

                                    Last time I was in "town", I was looking round one of the places where I buy engineering supplies, and came across a new stand, JB weld, it wasn't just fast and slow filler, but epoxy glue, shaft and screw lock, next time I'm in I'll see if they have a catalogue. quite a lot of competition for Loctite.

                                    Ian S C

                                    #314064
                                    richardandtracy
                                    Participant
                                      @richardandtracy

                                      Also, cure temperature alters strength. Doing work for an aircraft interior company stress office we found 4 hrs at 80C gave a stronger result for Redux 420 than a month cure at room temp.

                                      Regards

                                      Richard.

                                      #314072
                                      Neil Wyatt
                                      Moderator
                                        @neilwyatt
                                        Posted by Nick_G on 26/08/2017 03:12:27:

                                        .thick pint

                                        Barley wine?

                                        #314077
                                        Neil Wyatt
                                        Moderator
                                          @neilwyatt
                                          Posted by Ian S C on 26/08/2017 12:33:28:

                                          Last time I was in "town", I was looking round one of the places where I buy engineering supplies, and came across a new stand, JB weld, it wasn't just fast and slow filler, but epoxy glue, shaft and screw lock, next time I'm in I'll see if they have a catalogue. quite a lot of competition for Loctite.

                                          Ian S C

                                          I got sent a box of JB Weld samples way back (oh the perks of being an editor!) One I found surprisingly useful was the black silicone sealent/adhesive. I never thought of using 'gasket' type material as a glue before but it works well for purposes where you need a bit of give. See the next MEW for an example!

                                          Neil

                                          #314095
                                          duncan webster 1
                                          Participant
                                            @duncanwebster1
                                            Posted by Neil Wyatt on 26/08/2017 18:38:33:

                                            Posted by Nick_G on 26/08/2017 03:12:27:

                                            .thick pint

                                            Barley wine?

                                            Neil, if you're drinking Barley Wine by the pint I think you should go and see someone!

                                            #314102
                                            Ian Welford
                                            Participant
                                              @ianwelford58739

                                              If he's drinking it by the pint he'll be seeing multiples of anyone wink 2

                                              Re the original question I use araldite 24 hour slow cure as like someone mentioned the 5 minute went to a sort of hard toffee condition after a few years ( model aircraft use). The slow cure is still hard after 20 years ( and the models in one piece but still in the loft I admit)

                                              Ian

                                              #314103
                                              norman valentine
                                              Participant
                                                @normanvalentine78682

                                                Could this just be good marketing? I only use Araldite for anything that matters. It is not important, the cost of an individual "adhesion" is so small that is does not really matter. I fixed my glasses today, it worked, that is all that matters.

                                                #314155
                                                Neil Wyatt
                                                Moderator
                                                  @neilwyatt
                                                  Posted by duncan webster on 26/08/2017 19:43:01:

                                                  Posted by Neil Wyatt on 26/08/2017 18:38:33:

                                                  Posted by Nick_G on 26/08/2017 03:12:27:

                                                  .thick pint

                                                  Barley wine?

                                                  Neil, if you're drinking Barley Wine by the pint I think you should go and see someone!

                                                  I can see two of you!

                                                  #314165
                                                  duncan webster 1
                                                  Participant
                                                    @duncanwebster1

                                                    most people think seeing one of me is too many

                                                    #314363
                                                    Bob Gitsham
                                                    Participant
                                                      @bobgitsham90361

                                                      Hi, I have used a wide variety of epoxy adhesives and fillers over many years both as a hobbiest and as a professional marine engineer.

                                                      The cheap end products, from what are variously called dollar shops, pound shops or cheap as chips, etc. are usually fine for most non critical repairs around the home, and I usually keep some around.

                                                      At the other end of the scale, there is no substitute for the correctly formulated engineering products that are available, sure they are not cheap, but failure can be even more expensive. case in point, Many yeasr ago like about early 70's I used a Devcon product, don't remember which one, other than it was for high temperature, to repair a flame gouge out of a cylinder liner on a marine diesel engine.

                                                      The gouge was about 20mm wide and about 8mm deep in the top mating face of the liner where it mated with the cylinder head. The repair lasted about 3 weeks before we were able to get to a port where a more permanenet repair was available.

                                                      There are many specialist products out there, when it matters use them, they do work. when it's not important, cheap as chips is fine.

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