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#1
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One thing, from the ingredient list I posted earlier is Formula 409
contains Butyl Cellosolve. This is terrible stuff on plastics. It is what turns clear plastic molded meter windows foggy. I would not use Formula 409, or any other cleaner that contains Butyl Cellosolve on plastics of any sort. The stuff soaks into the plastic and makes it sticky and soft... sort of a plasticizer. -Chuck Harris |
#2
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Chuck Harris wrote:
One thing, from the ingredient list I posted earlier is Formula 409 contains Butyl Cellosolve. This is terrible stuff on plastics. It is what turns clear plastic molded meter windows foggy. I would not use Formula 409, or any other cleaner that contains Butyl Cellosolve on plastics of any sort. The stuff soaks into the plastic and makes it sticky and soft... sort of a plasticizer. It's fine on most plastics. It's a disaster on others, most notably phenolics. It will etch the hell out of bakelite and leave you an ugly dull surface. Test before using. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
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Scott Dorsey wrote:
Chuck Harris wrote: One thing, from the ingredient list I posted earlier is Formula 409 contains Butyl Cellosolve. This is terrible stuff on plastics. It is what turns clear plastic molded meter windows foggy. I would not use Formula 409, or any other cleaner that contains Butyl Cellosolve on plastics of any sort. The stuff soaks into the plastic and makes it sticky and soft... sort of a plasticizer. It's fine on most plastics. It's a disaster on others, most notably phenolics. It will etch the hell out of bakelite and leave you an ugly dull surface. Test before using. --scott Ford cars all come with warnings not to use cleaners containing butyl cellosolve on, or around the instrument panel. They tell of the damage they will cause to the speedometer window... And I have ignored the warning with 409, and other glass cleaners, and fogged the dash windows. I used to use 409 as a general cleaning agent on surplus test equipment, until I started to notice that I was ending up with power cords that became sticky, plastic tote handles that became sticky, and wrinkle paint that became softened and sticky. All anecdotal evidence, I know, but much of this equipment survived 20 years before my cleaning them with 409 without these failures occurring. Butyl cellosolve is used because it is an incredible penetrating agent. It burrows deeply into grease and grime, and softens it so that normal detergents can wash it away. It also does this to many plastics and rubbers. I believe that clear plastics that are polystyrene based are particularly affected by 409. If you do use 409, always rinse it away with water, never just spray and wipe, as the manufacturer recommends. Isopropyl alcohol is a great solvent for cleaning, but it too can cause problems with some plastics. Never leave acrylics soaking in isopropyl, as it will cause them to form deep cracks without ever softening the plastic. -Chuck |
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