Actually this is not on a boat, but same principles will apply.

I need to reglue--with epoxy I hope--something that appears to have been
glued with silicone. I recall reading of a solution that could be used to
wash the silicone residue that would otherwise prevent good adhesion. Maybe
powdered detergent and kerosene ? Sounds messy, but my memory might be in
left field.

Any ideas that work ?

Garland Gray II wrote:
Actually this is not on a boat, but same principles will apply.

I need to reglue--with epoxy I hope--something that appears to have been
glued with silicone. I recall reading of a solution that could be used to
wash the silicone residue that would otherwise prevent good adhesion. Maybe
powdered detergent and kerosene ? Sounds messy, but my memory might be in
left field.

Any ideas that work ?

IIRC, hexane will remove silicone residue.

Thanks.
Hexane is not something I recognise in products I'm familiar of. Where might
it be obtained ?
A search shows it to be potentially nasty.

"Brian Nystrom" wrote in message
news:hcWrh.7510$q32.3205@trndny01...

IIRC, hexane will remove silicone residue.

Garland Gray II wrote:

Thanks.
Hexane is not something I recognise in products I'm familiar of.
Where might
it be obtained ?
A search shows it to be potentially nasty.

It can be very nasty.

You probably will not be able to buy it at retail these days.

Just curious.

What are the two (2) parts that have the silicone on them?

What is the application?

Lew

My wife handed me a piece of her jewelry -- a square of ceramic or the
like-- from which the glued on eye had become detached. The old glue and
feels like silicone.

"Lew Hodgett" wrote in message
link.net...
Garland Gray II wrote:

Thanks.
Hexane is not something I recognise in products I'm familiar of.
Where might
it be obtained ?
A search shows it to be potentially nasty.

It can be very nasty.

You probably will not be able to buy it at retail these days.

Just curious.

What are the two (2) parts that have the silicone on them?

What is the application?

Lew

Garland Gray II wrote:

My wife handed me a piece of her jewelry -- a square of ceramic or the
like-- from which the glued on eye had become detached. The old glue and
feels like silicone.

Well in this case, silicone is probably the correct adhesive. Assuming
the eye is metal, epoxy may well not survive the differential thermal
expansion & contraction between the metal and the ceramic. Hexane is
(or was a few years back, you never can be sure over here with the EU
and VOCs) one of the major constituants of Evostik adhesive remover.
Might be worth going to a store and looking at a can.

Remember even to get silicone to stick, its going to need to be
'waterbreak' clean. You also need a really strong clear electrical
grade silicone. Probably be able to get away with Servisol silicone
adhesive sealent, but you *might* need the Dow-Corning variety. You cant
get that stuff off clean glass even *with* a razor blade.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL:
'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed,
All varnished hot moulded wooden racing dinghy.

Garland Gray II wrote:

My wife handed me a piece of her jewelry -- a square of ceramic or the
like-- from which the glued on eye had become detached. The old
glue and
feels like silicone.

There is a product called "Goof Off" which contains xylene, packaged
in a 4.5 OZ can, which you can buy at almost any hardware store.

"Goof Off" and judicious use of a tooth brush should get the surfaces
clean.

SFWIW, it has never failed me.

As others have commented, would not use epoxy for this application,
but rather a mastic type bedding compound as suggested by Ian.

Should be able to buy a small quantity in a "squeeze tube" type
package, again at a hardware store.

Lew

Thanks for all the responses.
This morning I asked around about hexane, but couldn't find anything
definitive, so I called 3M tech support, and they said to use "Brakeclean"
to remove the silicone film. I had some, so that is what I used. I then
bonded with some JB Weld, which also was on hand, and it's tighter than a
tick now.
Regarding possible failure from different coefficients of thermal expansion,
I don't think it will be subjected to enough temperature variation for this
to be a factor. I didn't say what sort of jewelry it is --a pendant on a
necklass .

"Garland Gray II" wrote in message
...
Actually this is not on a boat, but same principles will apply.

I need to reglue--with epoxy I hope--something that appears to have been
glued with silicone. I recall reading of a solution that could be used to
wash the silicone residue that would otherwise prevent good adhesion.
Maybe powdered detergent and kerosene ? Sounds messy, but my memory might
be in left field.

Any ideas that work ?

Garland Gray II wrote:

Thanks for all the responses.
This morning I asked around about hexane, but couldn't find anything
definitive, so I called 3M tech support, and they said to use "Brakeclean"
to remove the silicone film. I had some, so that is what I used. I then
bonded with some JB Weld, which also was on hand, and it's tighter than a
tick now.
Regarding possible failure from different coefficients of thermal expansion,
I don't think it will be subjected to enough temperature variation for this
to be a factor. I didn't say what sort of jewelry it is --a pendant on a
necklass .

Well, follow up in a month or so and tell us how its holding up.
Glad it worked out for you.

--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL:
'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed,
All varnished hot moulded wooden racing dinghy.