sm23221 Posted December 22, 2014 Share #1 Posted December 22, 2014 Advertisement (gone after registration) What's best for gluing the red dot back onto a lens? Cyanoacrylate? Epoxy? Thanks. Quote Link to post Share on other sites More sharing options...
Advertisement Posted December 22, 2014 Posted December 22, 2014 Hi sm23221, Take a look here Red Dot Glue. I'm sure you'll find what you were looking for!
pgk Posted December 22, 2014 Share #2 Posted December 22, 2014 In the past I've used double-sided sticky tape - a 'good quality' tape will stick well and hold in place, but can be removed with care if you need to again. I used a scalpel to trim around the 'dot' and to then remove the backing paper prior to poitioning. 1 Quote Link to post Share on other sites More sharing options...
jaapv Posted December 22, 2014 Share #3 Posted December 22, 2014 Never use anything as permanent as Cyanoacrylate or epoxy! Thin sticky doublesided tape is fine, I have also used the rubber glue for sticking photos in albums. 1 Quote Link to post Share on other sites More sharing options...
jdlaing Posted December 22, 2014 Share #4 Posted December 22, 2014 I've used a glue called E6000 a couple of times and never had one fall off though it can be removed if you want to. 2 Quote Link to post Share on other sites More sharing options...
sm23221 Posted December 22, 2014 Author Share #5 Posted December 22, 2014 Never use anything as permanent as Cyanoacrylate or epoxy! What would be the reason to NOT make the adhesion permanent? Quote Link to post Share on other sites More sharing options...
jaapv Posted December 22, 2014 Share #6 Posted December 22, 2014 That one needs to be able to remove it to adjust the rangefinder. Quote Link to post Share on other sites More sharing options...
sm23221 Posted December 22, 2014 Author Share #7 Posted December 22, 2014 Advertisement (gone after registration) That one needs to be able to remove it to adjust the rangefinder. You misread the question. I was referring to the lens not the camera body. Specifically, the red hemispherical piece of plastic on the lens barrel. Quote Link to post Share on other sites More sharing options...
jaapv Posted December 22, 2014 Share #8 Posted December 22, 2014 Sorry, in that case epoxy is fine. Chalk it up to extreme old age.... Acrylate glue may leave an unsightly white residue on the anodized surrounding of the dot which is hard/impossible to remove. 1 Quote Link to post Share on other sites More sharing options...
bocaburger Posted December 22, 2014 Share #9 Posted December 22, 2014 I used Rely-X Unicem because I had it handy, but epoxy would be what I'd suggest for the average person. 1 Quote Link to post Share on other sites More sharing options...
pgk Posted December 22, 2014 Share #10 Posted December 22, 2014 Not superglue (Cyanoacrylate) - I had a lens with a misaligned dot as a result of doing so and being ham-fisted:eek:. 1 Quote Link to post Share on other sites More sharing options...
tobey bilek Posted December 23, 2014 Share #11 Posted December 23, 2014 Not superglue (Cyanoacrylate) - I had a lens with a misaligned dot as a result of doing so and being ham-fisted:eek:. So CA glue works ! If ham fisted, use medium thickness and the instant fixer you spray on after the piece is positioned. I have built many a RC airplane that way. The thin will also work. Even 5 min epoxy takes 24 hrs for full cure. Quote Link to post Share on other sites More sharing options...
sm23221 Posted December 23, 2014 Author Share #12 Posted December 23, 2014 I used epoxy and it worked great. Hopefully it's there for ever now. Quote Link to post Share on other sites More sharing options...
Shac Posted December 24, 2014 Share #13 Posted December 24, 2014 Epoxy - I was told that superglue will eventually fail 1 Quote Link to post Share on other sites More sharing options...
marknorton Posted December 24, 2014 Share #14 Posted December 24, 2014 I've never had a problem with superglue but I agree epoxy is probably better. Key is to use the smallest amount possible so that when you press the dot into place, it does not exude from the edges. Also, use non metallic tools like a wooden tooth pick to apply to avoid damaging the finish. 2 Quote Link to post Share on other sites More sharing options...
otto.f Posted December 24, 2014 Share #15 Posted December 24, 2014 Last week I had it repaired at the best Leica repairman in my country. I don't know about the technical names, but he assured me that an elastic glue is imperative, a hard glue will always cause repeated loss of the little red knob 2 Quote Link to post Share on other sites More sharing options...
jdlaing Posted December 25, 2014 Share #16 Posted December 25, 2014 Last week I had it repaired at the best Leica repairman in my country. I don't know about the technical names, but he assured me that an elastic glue is imperative, a hard glue will always cause repeated loss of the little red knob This is what I discovered hence my post #4 above. 3 Quote Link to post Share on other sites More sharing options...
250swb Posted December 25, 2014 Share #17 Posted December 25, 2014 I agree, E6000 should be an ideal glue. I would never use epoxy or the normal hard super glue, they need a 'key' or alternatively a much larger surface area to bond strongly. You can get a flexible superglue that does bond very well, but with E6000 so easy to find on Ebay it is the better option. Steve 2 Quote Link to post Share on other sites More sharing options...
jdlaing Posted December 26, 2014 Share #18 Posted December 26, 2014 I agree, E6000 should be an ideal glue. I would never use epoxy or the normal hard super glue, they need a 'key' or alternatively a much larger surface area to bond strongly. You can get a flexible superglue that does bond very well, but with E6000 so easy to find on Ebay it is the better option. Steve Over here everybody and their brother sells it starting with WalMart, Ace, Lowes, Home Depot and the like. Even available in some drug stores. 1 Quote Link to post Share on other sites More sharing options...
bherman01545 Posted September 13, 2022 Share #19 Posted September 13, 2022 My Leica technician recommended Pliobond or Contact Cement. -Brad Quote Link to post Share on other sites More sharing options...
Al Brown Posted September 13, 2022 Share #20 Posted September 13, 2022 Someone resurrected this 7-year-old thread... By far the best is ultra thin double sided tape of the "strong" variety. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Quote Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/238815-red-dot-glue/?do=findComment&comment=4508601'>More sharing options...
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