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This discussion has been very interesting, because I have struggled with
glueing plastics.
However the key point, to me, has not been mentioned: How to identify the
*type* of plastic. Can somebody provide clues?
Another challenging question (for me): What product works well
on polyethylene and polypropylene, *and* has a good shelf life. I have used
"Loctite Super Glue All Plastics", which works well but is expensive and
has a short shelf life after being opened.
Chuck
On Wed, Oct 8, 2025 at 11:17=E2=80=AFAM <shop-talk-request@autox.team.net> =
wrote:
>
> Message: 1
> Date: Tue, 7 Oct 2025 13:18:30 -0500
> From: David Scheidt <dmscheidt@gmail.com>
> To: Jim Stone <1789alpine@gmail.com>
> Cc: Shop Talk <shop-talk@autox.team.net>
> Subject: Re: [Shop-talk] Plastic epoxy/solvent weld
>
> [snip]
>
> Methylene chloride is the traditional solvent for acrylic welding. It is
> now banned for most uses, so newer forulmulations use something else. I
> have not used any of them, as I don?t work with acrylic. But I did do som=
e
> in the mists of time. There were two types we used. One was a thin liqu=
id
> (straight methylene chloride, or very nearly, I think) that was used for
> fabricating stuff with tightly fitted gap free joints. The other was a g=
el
> that would work for joints with a gap, it had acrylic in it, I think, whi=
ch
> is what gave it gap filling power. Pick the right sort, based on how wel=
l
> your parts go back together.
>
> [snip]
>
> End of Shop-talk Digest, Vol 19, Issue 151
>
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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_defa=
ult" style=3D"font-family:verdana,sans-serif">This discussion has been very=
interesting, because I have struggled with glueing plastics.</div><div cla=
ss=3D"gmail_default" style=3D"font-family:verdana,sans-serif"><br></div><di=
v class=3D"gmail_default" style=3D"font-family:verdana,sans-serif">However =
the key point, to me, has not been mentioned: How to identify the <i>type</=
i> of plastic. Can somebody provide clues?</div><div class=3D"gmail_default=
" style=3D"font-family:verdana,sans-serif"><br></div><div class=3D"gmail_de=
fault" style=3D"font-family:verdana,sans-serif">Another challenging questio=
n=C2=A0(for me): What product works well on=C2=A0polyethylene and polypropy=
lene, <i>and</i>=C2=A0has a good shelf life. I have used "Loctite Supe=
r Glue All Plastics", which works well but is expensive and has a shor=
t shelf life after being opened.</div></div><div class=3D"gmail_default" st=
yle=3D"font-family:verdana,sans-serif"><br></div><div class=3D"gmail_defaul=
t" style=3D"font-family:verdana,sans-serif">Chuck</div><div><br></div><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Oct 8, =
2025 at 11:17=E2=80=AFAM <<a href=3D"mailto:shop-talk-request@autox.team=
.net" target=3D"_blank">shop-talk-request@autox.team.net</a>> wrote:<br>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;b=
order-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
Message: 1<br>
Date: Tue, 7 Oct 2025 13:18:30 -0500<br>
From: David Scheidt <<a href=3D"mailto:dmscheidt@gmail.com"; target=3D"_b=
lank">dmscheidt@gmail.com</a>><br>
To: Jim Stone <<a href=3D"mailto:1789alpine@gmail.com"; target=3D"_blank"=
>1789alpine@gmail.com</a>><br>
Cc: Shop Talk <<a href=3D"mailto:shop-talk@autox.team.net"; target=3D"_bl=
ank">shop-talk@autox.team.net</a>><br>
Subject: Re: [Shop-talk] Plastic epoxy/solvent weld<br><br>
<span class=3D"gmail_default" style=3D"font-family:verdana,sans-serif">[sni=
p]</span><br>
<br>
Methylene chloride is the traditional solvent for acrylic welding. It is<br=
>
now banned for most uses, so newer forulmulations use something else. I<br>
have not used any of them, as I don?t work with acrylic. But I did do some<=
br>
in the mists of time.=C2=A0 There were two types we used.=C2=A0 One was a t=
hin liquid<br>
(straight methylene chloride, or very nearly, I think) that was used for<br=
>
fabricating stuff with tightly fitted gap free joints.=C2=A0 The other was =
a gel<br>
that would work for joints with a gap, it had acrylic in it, I think, which=
<br>
is what gave it gap filling power.=C2=A0 Pick the right sort, based on how =
well<br>
your parts go back together.<br><br>
<span class=3D"gmail_default" style=3D"font-family:verdana,sans-serif">[sni=
p]</span><br><br>
End of Shop-talk Digest, Vol 19, Issue 151<br>
</blockquote></div></div>
</div>
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