Re: Curious.....PL premium

How unfortunate! Did you wash off and scuff up the PL beforehand? I
don't recall any non stick areas when I used this stuff, but maybe my
primer was a bit different.

>Marc Paquette wrote:
>
>My recent experience: Latex exterior primer does not stick to PL Premium.
>
>I've painted the enclosed fore and aft flotation compartments of my CSB Pirogue with
>Behr No.129 exterior latex primer.
>
>Not surprisingly, the primer coats untreated plywood and pine well. Luckily, it coats
>the compartments' epoxy and wood-flour fillets just as well. But the primer rolls off
>the PL adhesives like water off a duck's back.
>
>Marc.
>
--- Inbolger@yahoogroups.com, Lincoln Ross <lincolnr@r...> wrote:

> Did you wash off and scuff up the PL beforehand? I
> don't recall any non stick areas when I used this stuff, but maybe my
> primer was a bit different.

It could be the primer. I chose Behr No. 129 because of personal experience and
preference.

No washing. Some sanding, if only a scuff or two while sanding adjacent wood.

The exposed PL Premium and PL 400 that I tried to paint were just beads of adhesive
squished out from joints. I've only painted now-permanently-closed compartments,
so cosmetic appearance wasn't important. The rest of the compartments got two
good coats of primer, so I'm not worried.

However, to seal the boat, I've already started scraping and razoring off excess PL
from other joints and applying epoxy/wood flour fillets. The primer covers the fillets
nicely.

Marc.
--- Inbolger@yahoogroups.com, "roadhse2" <roadhse2@y...> wrote:

> Since i am getting ready to prime /paint this one sheet skiff , i
> thought i might try rolling glue on to form a skin that could be
> sanded and then painted...also it may help to stiffen the ply panels
> up somewhat and maybe stop the 'furries' from acx ply...

My recent experience: Latex exterior primer does not stick to PL Premium.

I've painted the enclosed fore and aft flotation compartments of my CSB Pirogue with
Behr No.129 exterior latex primer.

Not surprisingly, the primer coats untreated plywood and pine well. Luckily, it coats
the compartments' epoxy and wood-flour fillets just as well. But the primer rolls off
the PL adhesives like water off a duck's back.

Marc.
First of all, I've heard that other polyurethane glues may not be all
that similar to PL Premium, so you're on your own if you do that. If
it's like PL it may bubble up on you. I'm sure it will NOT add any
measurable stiffness as it is floppy stuff and even epoxy wouldn't do
much unless you built up an unreal amount of it. The only way to add
stiffness is to add something that DOES have at least a little
stiffness, like fiberglass. But do you really need a one sheet skiff to
be stiffer?

If I were you I would TRY YOUR PROPOSED PAINT ON A SCRAP and see what
happens. If the paint doesn't stick and soak in it would be my guess
that the problem is surface contamination. You could try scrubbing it
with a water/tsp solution (TSP commonly found in hardware stores) and
then sanding down the raised grain. I've seen latex on luan hold up very
well, btw, though if your skiff was made with luan I might be hesitant
with the tsp as the stuff might do something to the cheapo glue they use
sometimes on that kind of wood.

I also guess that there was something wrong with your luan and that the
ACX will be no problem.

I recall there is an (expensive) paint additive called Penetrol. Perhaps
that's what you need?

Good luck.

>Glen wrote:
>
>Or any other polyurethane glues......
>
>Has anyone ever tried diluting the glue (acetone, thinner, etc.) and
>then rolling or brushing on the whole exterior of the boat? Myself i
>have had poor luck in priming Luaun ply as it doesnt want to seep
>into the 'pores' and i never can get a good watertight finish...i
>have tried latex and oil both, rolled, brushed and sprayed with no
>better results....usually Walmart paints if that makes any
>difference..
>
>Since i am getting ready to prime /paint this one sheet skiff , i
>thought i might try rolling glue on to form a skin that could be
>sanded and then painted...also it may help to stiffen the ply panels
>up somewhat and maybe stop the 'furries' from acx ply...
>
>Small project so i figured it couldnt mess up to much and the GE400
>Plus glue(No PL Premium to be found near here, so i used GE's best)is
>fairly cheap here in the large tubes..$5.75..and should go a long
>ways diluted
>
>Any thoughts? Or am i thinking to far out of the box?
>
>P.S. Agree on the spam
>
>Thanks, Glen
>Southwest Missouri
>
I can't imagine trying to spread PL premium over such a large
surface. I am not sure about what you would use as a thinner. Epoxy
works quite well on the other hand for this same purpose and would
not be that much more expensive. However, nothing short putting a
layer of fiberglass cloth on the ply will stop AC Fir checking. Many
have used polyester resin without the fiberglass cloth as a coating.
I hope this doesn't start yet another epoxy/polyester debate. Some
have had long term success especially with boats that are stored
under cover on dry ground when not in use. It is well documented
that polyester resin doesn't bond as well as epoxy with plywood.

--- Inbolger@yahoogroups.com, "bill shamblin" <shamblin@h...> wrote:
> have not tried to use plpremium as a waterproof but do think it is
> the best polyurethans construction glue , at least much better than
> liquid nails.
>
> for an easy exterior coating, what about polyester resin without
the
> glass cloth? pretty cheap and easy except for the stink at
> installation. i have not tried this but have meant to. has anyone?
>
> bill in nc?
>
>
>
> --- Inbolger@yahoogroups.com, "roadhse2" <roadhse2@y...> wrote:
> > Or any other polyurethane glues......
> >
> > Has anyone ever tried diluting the glue (acetone, thinner, etc.)
> and
> > then rolling or brushing on the whole exterior of the boat?
Myself
> i
> > have had poor luck in priming Luaun ply as it doesnt want to seep
> > into the 'pores' and i never can get a good watertight finish...i
> > have tried latex and oil both, rolled, brushed and sprayed with
no
> > better results....usually Walmart paints if that makes any
> > difference..
> >
> > Since i am getting ready to prime /paint this one sheet skiff , i
> > thought i might try rolling glue on to form a skin that could be
> > sanded and then painted...also it may help to stiffen the ply
> panels
> > up somewhat and maybe stop the 'furries' from acx ply...
> >
> > Small project so i figured it couldnt mess up to much and the
GE400
> > Plus glue(No PL Premium to be found near here, so i used GE's
best)
> is
> > fairly cheap here in the large tubes..$5.75..and should go a long
> > ways diluted
> >
> > Any thoughts? Or am i thinking to far out of the box?
> >
> > P.S. Agree on the spam
> >
> > Thanks, Glen
> > Southwest Missouri
have not tried to use plpremium as a waterproof but do think it is
the best polyurethans construction glue , at least much better than
liquid nails.

for an easy exterior coating, what about polyester resin without the
glass cloth? pretty cheap and easy except for the stink at
installation. i have not tried this but have meant to. has anyone?

bill in nc?



--- Inbolger@yahoogroups.com, "roadhse2" <roadhse2@y...> wrote:
> Or any other polyurethane glues......
>
> Has anyone ever tried diluting the glue (acetone, thinner, etc.)
and
> then rolling or brushing on the whole exterior of the boat? Myself
i
> have had poor luck in priming Luaun ply as it doesnt want to seep
> into the 'pores' and i never can get a good watertight finish...i
> have tried latex and oil both, rolled, brushed and sprayed with no
> better results....usually Walmart paints if that makes any
> difference..
>
> Since i am getting ready to prime /paint this one sheet skiff , i
> thought i might try rolling glue on to form a skin that could be
> sanded and then painted...also it may help to stiffen the ply
panels
> up somewhat and maybe stop the 'furries' from acx ply...
>
> Small project so i figured it couldnt mess up to much and the GE400
> Plus glue(No PL Premium to be found near here, so i used GE's best)
is
> fairly cheap here in the large tubes..$5.75..and should go a long
> ways diluted
>
> Any thoughts? Or am i thinking to far out of the box?
>
> P.S. Agree on the spam
>
> Thanks, Glen
> Southwest Missouri
Or any other polyurethane glues......

Has anyone ever tried diluting the glue (acetone, thinner, etc.) and
then rolling or brushing on the whole exterior of the boat? Myself i
have had poor luck in priming Luaun ply as it doesnt want to seep
into the 'pores' and i never can get a good watertight finish...i
have tried latex and oil both, rolled, brushed and sprayed with no
better results....usually Walmart paints if that makes any
difference..

Since i am getting ready to prime /paint this one sheet skiff , i
thought i might try rolling glue on to form a skin that could be
sanded and then painted...also it may help to stiffen the ply panels
up somewhat and maybe stop the 'furries' from acx ply...

Small project so i figured it couldnt mess up to much and the GE400
Plus glue(No PL Premium to be found near here, so i used GE's best)is
fairly cheap here in the large tubes..$5.75..and should go a long
ways diluted

Any thoughts? Or am i thinking to far out of the box?

P.S. Agree on the spam

Thanks, Glen
Southwest Missouri
Or any other polyurethane glues......

Has anyone ever tried diluting the glue (acetone, thinner, etc.) and
then rolling or brushing on the whole exterior of the boat? Myself i
have had poor luck in priming Luaun ply as it doesnt want to seep
into the 'pores' and i never can get a good watertight finish...i
have tried latex and oil both, rolled, brushed and sprayed with no
better results....usually Walmart paints if that makes any
difference..

Since i am getting ready to prime /paint this one sheet skiff , i
thought i might try rolling glue on to form a skin that could be
sanded and then painted...also it may help to stiffen the ply panels
up somewhat and maybe stop the 'furries' from acx ply...

Small project so i figured it couldnt mess up to much and the GE400
Plus glue(No PL Premium to be found near here, so i used GE's best)is
fairly cheap here in the large tubes..$5.75..and should go a long
ways diluted

Any thoughts? Or am i thinking to far out of the box?

P.S. Agree on the spam

Thanks, Glen
Southwest Missouri