Old RTV

ctwo

ctwo

Merely Rhetorical
I assembled last night with Permatex Ultra Copper. It looked OK coming out of the tube, but it's probably a few years old. I did not notice a smell.

The first inch was put down on some paper towel and discarded. I retrieved that this morning and it's still doughy and sticky.

Anyone have experience applying vinegar to help it cure or should I just eat it and start over?
 
auntiebling

auntiebling

megalomaniacal troglodyte
Staff member
either way i don't think you should eat it. that's be about as wise as putting gorilla glue in your hair
 
JesasaurusRex

JesasaurusRex

Deleted User
Lol, I really wish they'd make smaller size tubes. It does always seem like I get 3 good uses out of a tube before it's dried to shit and I have to toss it 80% full. Course this is rev black, never actually used the copper.
 
TheRobSJ

TheRobSJ

Großer Mechaniker
JesasaurusRex said:
It does always seem like I get 3 good uses out of a tube before it's dried to shit and I have to toss it 80% full. Course this is rev black, never actually used the copper.
Click to expand...

Same result. You pierce the tip of RTV/sealant, you’ve got a short window to use whatever is in that tube. Think you’re gonna open something to get a couple dabs to seal a valve cover today and come back to that rube a month later? I wouldn’t trust it.
 
JesasaurusRex

JesasaurusRex

Deleted User
TheRobSJ said:
Same result. You pierce the tip of RTV/sealant, you’ve got a short window to use whatever is in that tube. Think you’re gonna open something to get a couple dabs to seal a valve cover today and come back to that rube a month later? I wouldn’t trust it.
Click to expand...

So wasteful though. Unless you work an assembly line who goes through more than half an RTV tube before tossing it?

Make them half the size ffs.
 
ctwo

ctwo

Merely Rhetorical
Half the size, same price; win win.

I had an idea, dip some of the RTV in vinegar and see how it feels tomorrow.

It's not a critical application.
 
scootergmc

scootergmc

old and slow
I keep clicking into this thread look for this:

old.jpg
 
afm199

afm199

Well-known member
My criteria is whether it's still easy to squeeze and sticks to my finger easily. When it comes out but it's dull, not shiny, and doesn't smear easily, it's done.
 
auntiebling

auntiebling

megalomaniacal troglodyte
Staff member
afm199 said:
My criteria is whether it's still easy to squeeze and sticks to my finger easily. When it comes out but it's dull, not shiny, and doesn't smear easily, it's done.
Click to expand...

this is also the description of the perfect booger, but inverse
 
ctwo

ctwo

Merely Rhetorical
The sample I exposed to vinegar might be a little firmer than the rest of slug left to "air dry" Both are about like chewing gum, not as sticky, but can still be broken down and smeared.

I'm using it on a heated cast aluminum pressure chamber that has a 1/8" tongue-and-groove seam with a formed, clear silicone gasket. The aluminum corroded in a few places and the oxide lifted the gasket seal and facilitated a leek.

I freshened the tongue surface and scrapped the groove mostly smooth, so it might not even need sealant, but I wanted an extra barrier so I applied a thin smear to each side of the gasket.

Since this chamber produces pressure by energizing an electric resistive heating element, I've decided to partially fill it with a water/vinegar mix and program it for partial heating cycles without pressure.

I'll check the RTV samples tomorrow.
 
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