I swore by my old light seal goop for a decade... then a Pentax 67 ate my lunch

Had a Pentax 67 mirror lock-up job come in from a photographer in Tacoma last week. The mirror foam was dust, obviously. I mixed up my usual batch of the solvent-based adhesive I've used forever, the one that sets up real tacky. Applied it, let it cure for the full 24 hours like always. The customer picked it up, called me two days later saying the new foam just peeled right off in one piece... like a sticker. Turns that old formula just doesn't bond right to the newer synthetic foams some companies are using now. A guy on a repair forum clued me in, said to switch to a specific acrylic-based adhesive, the B-7000 stuff. Tried it on a test piece and the bond is way stronger. Have you all run into this with newer replacement light seal kits? What adhesive are you using for them now?

3 comments

3 Comments

hunt.hayden18d ago

That B-7000 adhesive is a lifesaver now.

derek_ross18d ago

Seriously, it's the ONLY thing holding my old phone case together. I've used it on everything from headphones to a loose cabinet hinge. That little tube is basically a permanent resident in my junk drawer now.

taylor.brooke18d ago

That "permanent resident in my junk drawer" line from derek_ross is so real. It reminds me of my old car's side mirror that I kept reattaching with super glue for a whole year. Every fix felt solid until the next big pothole. I finally gave up and got it properly fixed, but I was weirdly proud of how long that glue held.