(Topic ID: 333285)

Removing petrified glue/adhesive from plastic

By roffels

1 year ago


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  • 11 posts
  • 8 Pinsiders participating
  • Latest reply 1 year ago by roffels
  • Topic is favorited by 1 Pinsider

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#1 1 year ago

Anyone have luck removing some petrified glue from plastic? I'm trying to remove the adhesive from these plastic parts on my Judge Dredd, with the goal of applying new stickers cleanly. The old stickers separated somewhat from their adhesive, and the old gunk is stuck to the plastic.

So far I've tried:
-soaking in 99% isopropanol alcohol and scrubbing
-Soaking in naphtha and scrubbing
-ultrasonic bath for 10 minutes with 50% water and simple green
-Overnight soak in goo gone and attempt to scrape off with a plastic razor

As you can see, it's still on there pretty good! I'd rather reuse these than replace if at all possible. Replacement ramp covers are available, but all the little costs on these games add up quickly.

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#2 1 year ago

Freeze spray?

#3 1 year ago

Is the adhesive residue even slightly tacky still?

If so, you might try the "flour and alcohol" trick as used with playfield mylar adhesive. Warning, that still requires a lot of mechanical interaction (i.e.: friction, wiping, scraping, etc) to remove.

For a part that small I might try warming it up in a water bath, or with a hair dryer, to see if that softens the adhesive and makes it easier to remove.

#4 1 year ago
Quoted from goingincirclez:

Is the adhesive residue even slightly tacky still?
If so, you might try the "flour and alcohol" trick as used with playfield mylar adhesive. Warning, that still requires a lot of mechanical interaction (i.e.: friction, wiping, scraping, etc) to remove.
For a part that small I might try warming it up in a water bath, or with a hair dryer, to see if that softens the adhesive and makes it easier to remove.

Unfortunately it's not tacky, and I've put it in an ultrasonic bath at 60 degrees Celsius without any luck.

I just left it in the freezer for a bit and dropped it in the ultrasonic to see if the temperature difference might help loosen it.

#5 1 year ago

Try polishing it with a strong rubbing compound.
It may well be etched from the glue. Clear plastic can easily be etched like that.

#6 1 year ago

have you tried gasoline on a rag. or turpentine?

#7 1 year ago

Sand it off, then flame polish? That might the the last resort option.

#8 1 year ago

If it is sticker residue, then you can use Goo Gone and it won't damage the plastic.

#9 1 year ago
Quoted from ccbiggsoo7:

have you tried gasoline on a rag. or turpentine?

No, but naphtha.

Quoted from Mr_Tantrum:

If it is sticker residue, then you can use Goo Gone and it won't damage the plastic.

Soaked overnight, nothing.

Quoted from High_End_Pins:

Try polishing it with a strong rubbing compound.
It may well be etched from the glue. Clear plastic can easily be etched like that.

Quoted from RC_like_the_cola:

Sand it off, then flame polish? That might the the last resort option.

These are probably my best options.

#10 1 year ago

.

#11 1 year ago

I went at it with sand paper, novus 3, and even dremeled a particularly troublesome spot, and called it "good enough."

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