[volt-nuts] PCB cleaning and sealing

Alan Scrimgeour scrimgap at blueyonder.co.uk
Sun Sep 26 11:54:56 UTC 2010

I find isopropyl alcohol doesn't remove all visible traces of flux. I also 
wonder if it's water content might cause the the same problems as water 
based pcb cleaners that I mentioned in my last post.
Ordinarily I use cotton buds and acetone.


----- Original Message ----- 
From: "Dr. Frank Stellmach" <drfrank.stellmach at freenet.de>
To: <volt-nuts at febo.com>
Sent: Sunday, September 26, 2010 8:20 AM
Subject: [volt-nuts] PCB cleaning and sealing

>  Andreas,
> I simply use products from Kontakt Chemie.
> http://www.crcind.com/csp/web/home.csp
> Kontakt LR = Kontakt PCC for chemical and mechanical cleaning (flux 
> residuals, water, dirt), afterwards Plastik 70 for sealing to avoid 
> corrosion, oxydation, leakage currents.
> Good ventilation during application is important for all solvents, which 
> have a good cleaning effect.
> They all are poisonous and  evaporate easily.
> To my experience, propyl alcohol is not strong enough, and acetone may 
> harm PCB and components.
> The additional mechanical cleaning by a brusch helps a lot.
> Frank
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