As Peter mentioned, I would steer completely away from anerobic thread locking compounds, particularly with polycarbonate. Many plastics are susceptible to "chemical stress cracking". I've worked in the cockpit display and illuminated panel industry and have seen numerous cases where threaded fasteners going into plastic bosses (with threaded inserts), turn into a mass of radial cracks after a month or 2 of service, particularly with acrylic and polycarbonate. If the title threadlocker is really important, Loctite makes a non-anerobic threadocker, Loctite 425, which is really a modified cyanoacrylate, that can be used safely with most plastics.
Gregg
-----Original Message-----
From: Peter Swanson [mailto:[log in to unmask]]
Sent: Friday, September 10, 2010 4:16 AM
To: [log in to unmask]
Subject: Re: [TN] IP67 - Gland + Threadlocker
Paul,
"Threadlockers" is the name usually given the anaerobic adhesives. They cure in the absence of oxygen and in the presence of metal ions.
Consequently, anaerobics are used for metal bonding, like bonding gears to shafts. They would not be suitable for plastics, if that is the case in your scenario.
Is the issue that you have two parts to mix? Perhaps a single part, electronics grade RTV silicone could be considered.
Regards,
Peter
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Peter Swanson [log in to unmask]
INTERTRONICS http://www.intertronics.co.uk
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul O Connor
Sent: 10 September 2010 11:59
To: [log in to unmask]
Subject: [TN] IP67 - Gland + Threadlocker
Hi,
My company has a product that is IP67 rated (Waterproof) there are cable glands that are fitted (threaded) to a polycarbonate case - I use a 2 part epoxy to seal thse glands at present does anyone know of a type of threadlocker gel that would give the same result?
Thanks
Paul
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