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The rubber casing has gone sticky - Praktica Optics

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Many cameras and binoculars are covered with a sprayed on thin layer of rubber which breaks down after about 5 to ten years. It becomes very sticky and can be scratched off with a fingernail. This leaves a messy surface which can be cleaned off with methylated spirits. Other solvents will work like isopropyl alcahol but avoid using solvents like cellulose thinners or white spirit as this can attack the underlying plastic on some cameras.

Posted on Jul 19, 2011

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vladmototole
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SOURCE: rubber housing on Sigma binoculars has gone sticky

  • Moisten a soft cloth with ammonia or Windex. Rub it over the sticky area to remove some of the damaged surface.
  • Ammonia can be used as well, but should be used with caution as it can cause damage to some plastic surfaces.
  • If the sticky, damaged surface remains, it can be scraped away with a spoon or dull knife.
  • Please note that these fixes are only temporary. Once the plastic starts to degrade, it will continue and the problem will be recurring. It is best to replace these parts whenever possible.
  • Posted on Nov 24, 2011

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