Not all RTV is Corrosive. - Chris Fagas

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Not all RTV is Corrosive.

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Posted by Chris Fagas on March 28, 1999 at 11:46:09

In Reply to: Re: WAIT A MINUTE !!!! posted by Jon Risch on March 26, 1999 at 20:39:02:

Jon,

Not all RTV contains acetic acid as a curing agent. The ones that smell like vinegar clearly do. The acetic acid curing agent makes the RTV cure very fast, but as you pointed out it is not acceptable for electronics applications due to its corrosive action.

However, many varieties of RTV are made which are completely non-corrosive, as they do not contain an acidic curing agent. For example, Dow Corning 3140 RTV Coating is a "non-corrosive, flowable, room temperature curing silicone rubber". It does take 24 to 72 hours to cure completely at room temperature since it lacks an acidic curing agent. For certain rough environmental applications entire circuit boards are coated with one or more layers of such non-corrosive sealants. Many high voltage devices require the added insulation which the silicone rubber adds. Heat (per mfr spec) can be used with some varieties to accelerate the curing process.

An electronics supply house (versus a hardware store) should be able to supply appropriate RTV for electronics applications.

Kind Regards, Chris

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Follow Ups Full Thread

Topic - Jon, my DIY RCA connections have a faulty process! - Edp 11:24:24 03/25/99 (16)

Ah ha, I think I found the common problem. - Edp 23:00:53 03/25/99 (0)

Re: Jon, my DIY RCA connections have a faulty process! - Jon Risch 17:52:11 03/25/99 (14)

Re: some interesting tricks - Limin Wu 22:47:50 03/25/99 (13)

Re: some interesting tricks - SFDude 10:42:19 03/26/99 (12)

Re: some interesting tricks - Limin Wu 12:01:37 03/26/99 (11)

WAIT A MINUTE !!!! - Sean 18:45:09 03/26/99 (10)

Re: WAIT A MINUTE !!!! - Jon Risch 20:39:02 03/26/99 (9)

Not all RTV is Corrosive. - Chris Fagas 11:46:09 03/28/99 (1)

Re: Not all RTV is Corrosive. - petew 19:40:50 03/29/99 (0)

Jon and Sean,Thanks! - Limin Wu 04:55:41 03/28/99 (6)

Re: Jon and Sean,Thanks! - abc 05:24:39 03/28/99 (5)

Re: Jon and Sean,Thanks! - Jon Risch 11:15:53 03/28/99 (4)

silicone RTV WITHOUT acetic acid....! - Dave 10:34:06 03/29/99 (3)

THIXOTROPIC !! ( I feel like an idiot ) - Dave 20:35:59 03/30/99 (0)

Re: silicone RTV WITHOUT acetic acid....! - Jon Risch 18:37:29 03/30/99 (0)

Various silicones... - jj 18:56:23 03/29/99 (0)

Follow Ups

Not all RTV is Corrosive. - Chris Fagas 11:46:09 03/28/99 (1)

Re: Not all RTV is Corrosive. - petew 19:40:50 03/29/99 (0)

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