OK I am adding to this as I JUST got through managing a 5200-attached hatch
on forward deck
STRONGLY recommend you not use mallet  or cutting as this can damage the
deck.
DEBOND (can get via Amazon)works well and is safer
Spray a good layer of the debond under one side of the tabernacle and wait
a few minutes, then lightly tap wooden wedges into the gap. patience
essential here. Spray more in and advance a little bit at a time. It will
work, just do not force it or you will split the fiberglass. Will need a
sharp chisel to clean off the gel coat
Agree that Practical Sailor article very helpful as well

On Tue, Oct 27, 2020 at 3:20 PM, Michael D. Weisner <mweisner at ebsmed.com>
wrote:

> I wonder how 3M 5200 compares to adult barnacle attachment secretion which
> is nearly impossible to break.
>
> Maybe Debond would work on barnacles!
>
> Mike
> s/v Wind Lass ('91)
> Nissequogue River, NY
>
> -----Original Message-----
> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> On Behalf Of
> Graham Stewart
> Sent: Tuesday, October 27, 2020 3:07 PM
> To: 'The Rhodes 22 Email List' <rhodes22-list at rhodes22.org>
> Subject: Re: [Rhodes22-list] removing tabernacle
>
> Mark: I wouldn't even use it for the hull-deck joint. In fact I had to
> break the seal to remove the foredeck on my boat. I may be the only person
> to ever do that but still I don't think anything is permanent. 5200 and
> similar are incredible adhesives but if you are primarily interested in a
> sealant where high adhesive qualities are not the highest priority and if
> there is any possibility that you might want to break the bond in the
> future, I would always seek an alternative. 3M 4200 is a very strong
> adhesive but is easier to remove.
>
> Graham Stewart
> Agile, Rodes 22, 1976
> Kingston Ontario
>
>
> -----Original Message-----
> From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf
> Of Mark Whipple
> Sent: Tuesday, October 27, 2020 10:28 AM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] removing tabernacle
>
> I've read that if you take a strong, thin wire like piano wire you can
> slowly cut through the 5200 (AKA Devil's Glue). Don't know if heating it
> would help. I've never needed to try this so if you do let us know how it
> goes.
>
> About the only legit use I've heard of for 5200 is a hull-to-deck joint.
> That's something that you hope you'll never have to disassemble.
>
> Good luck,
>
> Mark
>
> Boston, MA
>
> 2000 R22 *Luna Mia*
> 1987 Nimble 30 *For Sale*
> 1982 Com-Pac 16 *For Sale*
>
> On Tue, Oct 27, 2020 at 10:03 AM Graham Stewart <gstewart8 at cogeco.ca>
> wrote:
>
> > Where something is adhering to fiberglass with 5200 I think a
> > sufficient whack to break the bond is likely to remove the gel coat
> > before the bond breaks. A whack might work for a metal to metal bond
> > but I would still be very careful especially for something like cast
> aluminum.
> >
> > Graham Stewart
> > Agile, Rodes 22, 1976
> > Kingston Ontario
> >
> >
> > -----Original Message-----
> > From: Rhodes22-list [mailto:rhodes22-list-bounces at rhodes22.org] On
> > Behalf Of Ric Stott
> > Sent: Tuesday, October 27, 2020 8:09 AM
> > To: The Rhodes 22 Email List
> > Subject: Re: [Rhodes22-list] removing tabernacle
> >
> > Careful wack with Rubber mallet!!
> > Ric
> > Dadventure
> >
> > Sent from my iPhone
> >
> > > On Oct 26, 2020, at 11:43 PM, Chris Geankoplis <
> > chrisgeankoplis at gmail.com> wrote:
> > >
> > > ?Hey Jesse,
> > > Sounds like PL5200. Strongest stuff in the world. Just about
> > > impossible
> > to
> > > remove. You might make a hack saw frame but with the blade at 90
> > > degrees
> > to
> > > a normal one. Slowly cut between the cabin roof and tabernacle. At
> > > some point you can apply a rotational motion and should get it off.
> > > You will Have an ugly scarred area. Research to see if they have
> > > come up with a solvent for 5200. If so, use that rather than the
> > > butchery method. Good luck.
> > >
> > > Chris Geankoplis
> > > Enosis.
> > >
> > >> On Mon, 26 Oct 2020 at 21:51, Jesse Shumaker <
> > jesse.laten.shumaker at gmail.com>
> > >> wrote:
> > >>
> > >> Hi, I'm attempting to remove the mast tabernacle in order to
> > >> install the Dwyer Halyard Organizer plate (part DH288).  The three
> > >> screws came out easily, but the tabernacle is still attached very
> > >> strongly with an adhesive.  I don't know what adhesive was used.
> > >> The adhesive is colored white.  I tried heating up the plate with a
> > >> soldering iron and tried to squeeze in a razor but have been unable
> to break the seal.
> > >>
> > >> I would appreciate any tips from the group on how to free the
> > >> tabernacle from the cabin top.  Thanks in advance for any advice!
> > >>
> > >> Jesse Shumaker
> > >> S/V Zephyr
> > >>
> >
> >
>
>