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HelicopterMain Discussion › RTV for electronics
12-02-2005 06:25 AM  12 years agoPost 1
nap_tan

rrApprentice

Santa Clara CA, USA

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Hello Everyone,

I was just wonderng if anyone knew where to get the RTV like substance they use to secure wires on to PCB (like the ones on the futaba servos)

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12-02-2005 06:48 AM  12 years agoPost 2
woppini

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Dublin CA

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Just a guess, but i have used the hotmelt glue gun for those kinds of things..

my wifes cooking is so bad, the flies are sewing the holes in the screen door

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12-02-2005 12:12 PM  12 years agoPost 3
jackfrost

rrNovice

Johnston Ohio

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nap_tan

We use Dow Corning 748 Non-Corrosive on boards and wiring for use in our control system. Haven't had any problems.


John

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12-02-2005 12:23 PM  12 years agoPost 4
z11355

rrMaster

New England

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mcmaster.com page 3180

I use Dow 737 but thats what I have a tube of and it's
neutral cure.

748 is probably a better bet

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12-03-2005 06:09 AM  12 years agoPost 5
nap_tan

rrApprentice

Santa Clara CA, USA

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thanks for the reply guys. I'll try to order the 748

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12-03-2005 07:26 AM  12 years agoPost 6
nap_tan

rrApprentice

Santa Clara CA, USA

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Another thing. There seems to be a yellow - contact cement like substance that manufacturers use secure components onto PCBs. Anyone know what this is?

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12-04-2005 04:12 AM  12 years agoPost 7
donlynn

rrKey Veteran

New Zealand

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Neutral cure

Gidday

Re the hot glue gun

I know from my fling in automotive electronics neutral cure is vital
as said by Z + Jack

Seting aside contaminating the lambda(O2) sensor in cars requiring 'sensor safe' compounds, alot of non neutral or acidic(sometimes vinegar smell) eats the copper track.
Renault Feugo, a nice shape liftback( round mid 80's) have a known problem of the goop used in the distibutor bottom on top of the electronics eats the pcb, they failed in bunches about 10-15 yrs ago. The clue was the transparent yellow went a more brown colour. Bizzare but true.
I'd ask a few of your local electronics circuit board manufacturer & repairs if you cannot access the reccomended.

Regards Donald

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