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12-30-2017, 03:38 PM   #1
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Which glue to reattach loose felt in a DA Limited lens cap?

I noticed that the felt inside my new 20-40 Ltd's lens cap has kind of come unstuck from the metal in a small area. It still stays on the lens, but I want to reattach it to the metal to prevent the separation from progressing. If I can get the job done with a household product in 5-10 minutes, that would save me from dealing with any kind of RMA to Pentax.

Any ideas on which glue would be best for this?

12-30-2017, 04:05 PM   #2
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I like Elmer's rubber cement. Apply it sparingly, though. It's a really good product, useful for many things
12-30-2017, 04:27 PM - 1 Like   #3
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QuoteOriginally posted by BigMackCam Quote
I like Elmer's rubber cement.
So does Elmer !! But seriously Gimbeley, this is a sound choice, but please make sure that any adhesive that you use is completely dried before putting the cap back on the lens, as vapors given off by some glues may damage the lens coatings. Good luck.
12-30-2017, 05:40 PM - 1 Like   #4
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12-30-2017, 09:10 PM   #5
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QuoteOriginally posted by Gimbeley Quote
I noticed that the felt inside my new 20-40 Ltd's lens cap has kind of come unstuck from the metal in a small area. It still stays on the lens, but I want to reattach it to the metal to prevent the separation from progressing. If I can get the job done with a household product in 5-10 minutes, that would save me from dealing with any kind of RMA to Pentax.

Any ideas on which glue would be best for this?
I used some standard issue super glue to attach felt to a 3D-printed cap for the FA 31mm, and it worked out very well.

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12-31-2017, 01:07 AM   #6
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I'd use a runny super glue. Hobby stores (radiio controlled) sell various grades of super glue for gluing rubber tires to plastic wheels, some are thick and some are runny. The thick stuff takes longer to dry, while the runny stuff is much quicker to dry. Usually store bought super glue is very runny, and dries quick, and the fumes evaporate quickly. You will only need a small drop otherwise it might melt the fabric. Thats how the bond is created, by melting the two surfaces together.

Using rubber cement, you might get a mozzarella string come off the nozzle and when it breaks, it goes anywhere. Turpentine cleanup. Rubber is susceptible to heat, so it might delaminate over time.
12-31-2017, 08:39 AM   #7
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Contact cement is the normal adhesive used for this but pretty much any glue will work. I think the super glue idea is a really bad one. A small amount of polyurethane adhesive such as Gorilla glue would work fine. Whatever you use, make sure you apply it sparingly.

12-31-2017, 08:46 AM   #8
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Pliobond is good to keep on hand as it is the adhesive of choice for this and many camera repairs.
Unlike most permanent adhesives bonded parts may be removed if necessary for service in future.

Chris
12-31-2017, 12:47 PM   #9
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SuperGlue is bad - it dries hard. You want something that will keep the felt / leather flexible / compressible
01-02-2018, 09:43 AM   #10
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QuoteOriginally posted by ChrisPlatt Quote
Pliobond is good to keep on hand as it is the adhesive of choice for this and many camera repairs.
Unlike most permanent adhesives bonded parts may be removed if necessary for service in future.

Chris
+1 for Pliobond. I had forgotten that stuff existed.
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