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Author Topic: Which adhesive to use when applying ply skins to the bulkheads???  (Read 5151 times)

davejay

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Hi all,

I'm getting ready to put the skins on my 1/9th scale 43ft RSL, I was going to do the scale double diagonal plank thing but have decided to do the skinning in four  seperate pieces (i.e 2 bottoms 2 sides!), I'm just wondering which is the best adhesive to use  and whether to start from the bow and work backwards or vice versa?

All input welcome

Many thanks

DAve J
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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #1 on: June 30, 2012, 10:25:35 pm »


For wood on wood, you cannot beat PVA glue.  It will need clamping and leaving overnight but it will confidently hold it's grip.


cheers

ken
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davejay

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #2 on: June 30, 2012, 10:35:14 pm »

Thanks for that Ken, I remember being told many moons ago that the slower the setting time the stronger the bond, I guess thats true with PVA, I've got EVo resin W, presume thats the best to use?

Cheers

Dave J
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Colin Bishop

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #3 on: June 30, 2012, 10:53:18 pm »

For wood to wood I reckon you can't beat Aliphatic.

Colin
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derekwarner

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #4 on: July 01, 2012, 02:30:41 am »

I must agree with Colin here..... O0


http://www.google.com/url?sa=t&rct=j&q=polyurathane%20aliphatic%20glue&source=web&cd=1&ved=0CF4QFjAA&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPolyurethane&ei=HqnvT8SkJfGviQfXqPGuDQ&usg=AFQjCNE_rlLn4nCxgzI0hz7G2sR2UNlwQQ

Polyurathane aliphatic glue is 100%  water proof when cured & 100,000,000,000,000,000,000,000,000,000,000  times superior to PVA in damp conditions ......  :-))

Derek
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Artistmike

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #5 on: July 01, 2012, 07:31:21 am »

Another vote for Aliphatic here, After many years of using PVA I've now moved over to it completely, as for the sort of jobs we do it's a far superior product. Just another example of the way that glue technology has moved forward I suppose.

I've just done a boat using precisely the same building technique that you're about to and it worked a treat... waterproof, tough and nicely sandable and has a similar 'feel' to PVA when you're working with it, but I like the faster grip you get . 
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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #6 on: July 01, 2012, 10:22:03 am »


I stand corrected.  I thought Aliphhatic was know as PVA.   :embarrassed:  because that's the stuff I use. 

Having read Derek's treatise recommended above, I am a little wiser, but not much.   ok2

Anyway, I think you get the idea Dave J

regards

ken
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Colin Bishop

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #7 on: July 01, 2012, 10:51:00 am »

PVA is now generally considered to be stuff like Evo Stik exterior wood glue which works OK but Aliphatic is a big improvement while the more expensive Super Phatic from Deluxe Materials is a sort of woodworking equivalent of superglue but still has water clean up.

Colin
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Stavros

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #8 on: July 01, 2012, 12:30:34 pm »

How about Gorrilla glue rather messy on the hands but what a strong bond


Dave
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davejay

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #9 on: July 01, 2012, 06:03:30 pm »

Thanks for all the feedback guys, much appreciated.
Looks like i'll be using aliphatic, just bought a big bottle of resin w prior to posting this post, should have asked first!!!........guess I can use the resin w for coating the insides of the skins etc!!

All the best shipmates

Dave J
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John W E

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #10 on: July 01, 2012, 06:44:17 pm »

Hi ya there Dave

ResinW or Evostik exterior/pva glue will do okay for bonding the hull skin to the bulkheads, just remember - seal the exterior skin with something like a good coating of paint.  Or, for a better job - finishing Zepoxy.   I have a few hulls I have built using ResinW, PVA glue which has been about for 30-40 year and they havent fallen apart yet - YET I SAY :-) only time it does fall aprt (the model) is when it his the pond side with full belt - or dropped by Riggers :-) or hoyed in by me isnt that right Dicky. %) %)

aye
john
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davejay

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #11 on: July 02, 2012, 12:09:28 pm »

Thanks for that John, I might as well use the evo resin w, as you say yours have been 'hoyed in' and dropped etc so i'm sure it can withstand any (if any) abuse I can give it!!!!!!

Was going to coat the exterior with sanding sealer until I get a super smooth finish then apply paint via an airbrush for hopefully a flawless finish, hope shes still about in 30-40 years time as yours are!!!!

All the best

Dave
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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #12 on: July 02, 2012, 02:12:07 pm »


 Where can you get Polyurathane aliphatic glue in the UK in decent size bottles?
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Colin Bishop

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #14 on: July 02, 2012, 04:50:33 pm »

I think there is more than one type of Gorilla glue. The variety most people are dsescribing is the one which has a foaming gap filling action. This is quite different to normal Aliphatic glue which is simply a thin liquid. which penetrates the wood.

Colin
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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #15 on: July 02, 2012, 05:32:24 pm »

There is Aliphatic PVA, which is usually yellow in colour, and snads nicely unlike normal PVA which tends to remain a bit chewy in my experience.
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essex2visuvesi

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Re: Which adhesive to use when applying ply skins to the bulkheads???
« Reply #16 on: July 02, 2012, 05:54:57 pm »


 Where can you get Polyurathane aliphatic glue in the UK in decent size bottles?


http://www.shop4glue.com/

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