Glue for laminating

[EASLOOP]

Lots of stuff in the archives on sistering frames with in-situ lamination but not a lot on the best glue.
Ideally I would like to use a one part glue. Does anyone know of a tried and tested one part glue for laminating frames?

Look forward to your comments.

 

[old_salt]

Have a look here.:- Balcotan.
I use it and it is excellent.
Cheers hope this helps David.

 

[EASLOOP]

Thanks for your input. It seems that may do the trick. But, I plan to do the laminating in-situ holding down each laminate with either s/s staples or s/bronze screws (small ones). Will this create enough pressure to make the joint good and strong?
The details also suggest that Balcotan will fill small gaps - is this your experience?

 

[Poignard]

Balcotan will fill gaps but what it fills them with isn't very strong compared with epoxy. If your joinery isn't going to be perfect I would recommend epoxy.

 

[dur]

[ QUOTE ]
Balcotan will fill gaps but what it fills them with isn't very strong

[/ QUOTE ]

I agree and IMHO Balcotan needs to be close cramped for a strong result. Not sure that this is possible when laminating a frame in situ.

 

[old_salt]

As mentioned above quote:-
Balcotan will fill gaps but what it fills them with isn't very strong.
But if your joints are good and tight and screwed it will bond excellently and be stronger than the wood, I have done some experimenting with it and found if the joint is tight it will work very well, the ode small gap should not effect it.

As to regards sistering frames. My 1905 Gaff Cutter arrived with some 50 ribs cracked or broken so we decided to replace them all in one piece steamed welsh oak was what we used, but that would require you removing the cover-board or gar-board possibly the stringer or a combination of them plus lot of excessive bending.
Cheers and hop this helps.

 

[Victorious]

Balcotan is great for softwoods... Not so good for hardwoods.. Oak is prob the worst timber to glue with it. (imho)
Id use epoxy every time.

 

[andrewbodenham]

I've used Balcotan with great sucess, but be aware that there are several grades. The 60112 Fibre-gel is a fibre reinforced thixotropic format which has better gap filling characteristics than the unthickend versions, and is my adhesive of choice for nearly everything. 60190 is specified for glu-lam structural components, but I have not used it, yet.
The Melco Bonding Supplies website has excellent technical info.
Melco Bonding Supplies

I don't think you'll achieve sufficient clamping with staples, especially at such tight radius. Could you arrange some sort of shoring & wedging set up? Or take the curve off the boat and do the lamination on the bench where you can get a decent clamp-up. When you do your test pieces you'll find that PU glues are very slippery until cured, so very good restraint in all directions is required to stop your laminates sliding off in odd directions!

 

[Guest]

[ QUOTE ]
Lots of stuff in the archives on sistering frames with in-situ lamination but not a lot on the best glue.
Ideally I would like to use a one part glue. Does anyone know of a tried and tested one part glue for laminating frames?

Look forward to your comments.

[/ QUOTE ]

I know you said that you would prefer a one part glue, but for what you describe I would strongly recommend this...

http://www.eurofixings.co.uk/humbrol-extraphen-water-resistant-glue-p-2115.html

It aint cheap, but it will do the job, even on Oak

 

[jhughes]

Have to disagree with you on that point, I have had excellent results glueing Oak, Iroko and Ash with Balcotan and other Polyurethane glues.