Michael Keane K1MK wrote:
> The other thing about using RTV is that RTV needs
> to be exposed to moisture to cure. So you don't
> want to cover up RTV with anything like tape or
> other sealants at least until the full cure time
> of the RTV, otherwise the RTV will never fully harden but rather remain tacky.
I believe this is only true for the one-part RTVs.. the two part RTVs
do not require exposure to moisture, and tend to outgas less.
I suppose it comes down to whether one wants caulk or a potting compound.
Either type is available from the usual mail-order sources (Newark,
Mouser, Allied)
MG Chemicals is the new company that handles what used to be GE
silicones. http://www.mgchemicals.com/products/silicones/guide.html
Walks you through which one you need (then you can hope that the minimum
quantity isn't a 55 gal drum). They cover things like thermal
conductivity (important for some applications, e.g. potting a balun or
HV power supply), cure types, etc.
For instance, a 2 part RTV12 is intended for electrical potting, is
primerless, and translucent and fairly runny (1500 cps). RTV11 is much
stiffer, white, and much harder after cure.
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