Resin ??'s.. Epoxy over Polyester or Polyester over Epoxy?

[The OTHER Kevin in San Diego]

Need to do some resin work in the very near future and the project I'm
working on has been resined before. I forgot if you can do epoxy over
polyester or polyester over epoxy.

If memory serves, the 1st resin job was epoxy, but am not 100% sure so
I'd rather re-resin with the stuff that'll stick to either epoxy or
polyester..

a lil' help please!

[Tim Wescott]

The OTHER Kevin in San Diego wrote:
> Need to do some resin work in the very near future and the project I'm
> working on has been resined before. I forgot if you can do epoxy over
> polyester or polyester over epoxy.
>
> If memory serves, the 1st resin job was epoxy, but am not 100% sure so
> I'd rather re-resin with the stuff that'll stick to either epoxy or
> polyester..
>
> a lil' help please!
>
>
http://www.azom.com/details.asp?ArticleID=1161

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/

In article <p5ot22tkep47r3qpp2pem4dhoblnink4bc@4ax.com>, The OTHER Kevin
in San Diego <skiddz "AT" adelphia "DOT" net> says...
> Need to do some resin work in the very near future and the project I'm
> working on has been resined before. I forgot if you can do epoxy over
> polyester or polyester over epoxy.


Epoxy over polyester!

[The OTHER Kevin in San Diego]

On Sat, 01 Apr 2006 13:04:33 -0800, Tim Wescott <tim@seemywebsite.com>
wrote:


>http://www.azom.com/details.asp?ArticleID=1161

Looks like Epoxy is the way to go..

Thx Tim!

[Double Ace]

For some reason Polyester resin doesn't cure when used over Epoxy
resin. On the other hand, Polyester resin doesn't bond very well to
Epoxy and may delaminate later on. It's best to use what ya used
before. However, you can coat Epoxy with a thin layer of 5-Minute Epoxy
and Polyester sets up fine. 5-Minute Epoxy doesn't seem to inhibite the
curing the way regular epoxy does.

[The OTHER Kevin in San Diego]

On 2 Apr 2006 21:35:02 -0700, "Double Ace" <dbdorton@hotmail.com>
wrote:

>For some reason Polyester resin doesn't cure when used over Epoxy
>resin. On the other hand, Polyester resin doesn't bond very well to
>Epoxy and may delaminate later on. It's best to use what ya used
>before. However, you can coat Epoxy with a thin layer of 5-Minute Epoxy
>and Polyester sets up fine. 5-Minute Epoxy doesn't seem to inhibite the
>curing the way regular epoxy does.

Don't know what I used before - it was over 20 years ago.. In any
case the Epoxy resin I used cured up just fine and there doesn't seem
to be any adhesion problems - at least none that a couple hours of
sanding could have turned up.

[Abel Pranger]

On 2 Apr 2006 21:35:02 -0700, "Double Ace" <dbdorton@hotmail.com>
wrote:

>For some reason Polyester resin doesn't cure when used over Epoxy
>resin. On the other hand, Polyester resin doesn't bond very well to
>Epoxy and may delaminate later on. It's best to use what ya used
>before. However, you can coat Epoxy with a thin layer of 5-Minute Epoxy
>and Polyester sets up fine. 5-Minute Epoxy doesn't seem to inhibite the
>curing the way regular epoxy does.

That's the way i recall it, Ace. Another solution I recall from the
lore is to take a swipe of CA over the polyester (or unknown) resin,
then epoxy will adhere and cure.

Abel

[Jim Slaughter]

epoxy over polyester. Polyester eats epoxy so you can't go that direction.


"The OTHER Kevin in San Diego" <skiddz "AT" adelphia "DOT" net> wrote in
message news:p5ot22tkep47r3qpp2pem4dhoblnink4bc@4ax.com...
> Need to do some resin work in the very near future and the project I'm
> working on has been resined before. I forgot if you can do epoxy over
> polyester or polyester over epoxy.
>
> If memory serves, the 1st resin job was epoxy, but am not 100% sure so
> I'd rather re-resin with the stuff that'll stick to either epoxy or
> polyester..
>
> a lil' help please!
>
>