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Adhesive

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tim2542(at)sbcglobal.net
Guest

Posted: Wed Jul 24, 2013 2:25 pm Post subject: Adhesive

I have a little DC-DC converter(pc board & components) robbed out of a Cig adapter that Im relocating into a plastic utility box. I need to pot it in position. 



Is Shoe Goo a good choice here? IF not what is? The adhesive will need to contact the "verks" and be non conductive or corrosive



Thanks in advance!

Tim

 [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Jul 24, 2013 3:03 pm Post subject: Adhesive

At 05:23 PM 7/24/2013, you wrote:

 	  Quote: 	
		  I have a little DC-DC converter(pc board & components) robbed out of 

a Cig adapter that Im relocating into a plastic utility box. I need 

to pot it in position.

Is Shoe Goo a good choice here? IF not what is? The adhesive will 

need to contact the "verks" and be non conductive or corrosive

Thanks in advance!

Tim


	


   shoe-goo is a close cousin to E6000 which

   is solvent based, water clear, and non

   conductive. HOWEVER, it may attack your

   plastic box.



   Alternatively, RTV sealant used for

   aquarium sealing is an option.



   also, 5-minute epoxy won't attack the

   plastics . . . but may not get a

   really good grip on smooth, bright

   surface of plastic box.



   Bob . . .

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jonlaury

Joined: 06 Nov 2006
Posts: 336

Posted: Thu Jul 25, 2013 3:17 pm Post subject: Re: Adhesive

[quote="nuckolls.bob(at)aeroelect"]At 05:23 PM 7/24/2013, you wrote:

 	  Quote: 	
		  

snip....

   also, 5-minute epoxy won't attack the

   plastics . . . but may not get a

   really good grip on smooth, bright

   surface of plastic box.



   Bob . . . 	




You can overcome the lack of adhesion to plastic by drilling some counter sunk holes on the outside of the box. Force epoxy through them to the inside and clamp your electronic guts to the inside over the epoxy. When the epoxy sets, your electronic gizmo is held by epoxy 'rivets'. 

If your epoxy runs, turn the project so the counter sunk holes are facing up or use a thixotrope like cabosil (fumed silica) to make it into more of a paste.

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