yarn light seal, cheap, durable ......

[caila77]

I recently tried to delve deeper into the use of cotton thread to ensure light coverage on the backs of cameras.
while I found several references to the type of cotton on the web, I found little about the technique: some even use the thread alone, which would remain in place without the need for additions. Others, however, add a little glue, but I haven't found any indications of the suitable type of glue: something repositionable? .

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[MarkWalberg]

I use just a wee bit of contact cement, sometimes only at the end of the string.

 

[KoNickon]

If you're wedging it into a tight groove like as pictured in the link above, I think the yarn should stay put perfectly well if carefully crammed down. You don't want the yarn to fit too easily. And I think wool or acrylic -- something fuzzy -- is better than cotton.

Yes, maybe a little adhesive at the ends so they don't start to come out, but no more than that.

 

[Retro-Grouch]

If you can make it work, the yarn is far, far better than foam. I have 50 year old film backs that have yarn seals that are like new. Foam? Ten years, and you may be looking at replacement, again.

 

[shawn]

Black wool yarn works great for light seals. If you need it a little thinner you just unwind threads of it.

Pro tip, when you are removing the old foam don't bother trying to clean out the sticky glue residue in the channel. It will hold the yarn in place.