ATP 205 reseal in Hydraulic fluid. Just how bad are esters for teflon seals?

Joined
Jan 4, 2012
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4
Location
nh, usa
I have a 1970's backhoe which means old seals abound and leaks aplenty.
I have had amazing luck with ATP205 in my cars and refreshing general rubber materials like door/sunroof seals and gaskets.
I've submerged rock hard old seals in a cup and woken up to a soft almost fresh feeling seal the next day.

What I have come across on here though is minimal posts about this wonder fluid. The primary ingredient is Diethylene Glycol Monoethyl Ether.

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2816155/atp-205-reseal
That post mentions it eats plastic/teflon/delrin type seals.

How corrosive and dangerous is it to them?
Hydraulic cylinders have teflon ring seals in them. I want to make sure I'm not creating more problems than I fix but a plasticizer could likely go a long way on such old seals.
 
If you're still around here, I would be interested in knowing if you ever tried this? I have a Kubota mini excavator that is leaking out of the valve stack because the o-rings got cooked and srunk. ATP205 would be perfect for this, however, not at the expense of eating the other thousand o-rings in that machine.
 
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