Glue and Water - Which ones don't belong?

[bob the builder]

I'm at the point where I'll be adding the "guts" to my Nautilus soon, and I'm vaguely remembering a myriad of posts here as to which glues don't react well to prolonged exposure to water.

Just so I'm straight on things... can anyone tell me which glues I should and shouldn't be using to mount hardware/linkages etc...?

My hull halves will be "glued" with fibreglass and resin, so I'm not too worried about that, but how about the components?

Any help would be very much appreciated.

[dietzer]

I'm at the point where

I'm at the point where I'll be adding the "guts" to my Nautilus soon, and I'm vaguely remembering a myriad of posts here as to which glues don't react well to prolonged exposure to water.

Just so I'm straight on things... can anyone tell me which glues I should and shouldn't be using to mount hardware/linkages etc...?

Well, first of all, don't use elmers.

On a more serious note, I seem to recall watching a sub conference video (one where Skip Asay and others were talking) that said not to use the 5 minute or 30 minute epoxies in places where they would have prolonged contact with water. Something about them turning into goo after a year or so. My impression was that you could use them inside the WTC but not outside.

Now, that video was shot "many moons ago", so I'm not sure if that's still true of today's 5 or 30 minute epoxies or not. But I thought I'd pass it along.

Carl

[robse]

Carl]

[color=#0000FF]Carl]

[Guest]

Use resin and rovings for

[color=#000080]Use resin and rovings for bonding into the hull.
24 hour epoxy/araldite for bits and bobs that the former won't work with.
A very good brand of cyano for detail pieces (can't go wrong with loctite, give the hobby brands the heave-ho, they're generally crap!)

Don't use]



Edited By Sub culture on 1049833507

[robse]

HI again.

Andy]http://www.subcommittee.com/forum/icon_smile.gif

HI again.

Andy]http://www.subcommittee.com/forum/icon_smile.gif[/img]

[john]

Can I recommend a sealant

Can I recommend a sealant called Sykoflex marine sealant. I use it extensively on my (real) boat.

We use it as a liquid gasket between deck fittings and fibreglass hull, under all sea cock flanges and under all bolt heads and washers and to seal around windows and thorugh deck electrical fittings. It sets to a rubbery consistancy and is impervious to sea water and once in place is absolutely waterproof.

It is a tad expensive but is better than any silicone sealant. It is widely available from European marinas (its a French product).

John

[anonymous]

Hi Bob,

Most modellers I have

Hi Bob,

Most modellers I have talked to, avoid the fast curing Epoxy´es, 5 and 20 min. for boats.
I have used a 1-hour Epoxy and a 2-component Acrylic glue named Fusion in my ship, both from the company Deluxe Materials. My ship so far only has around 12 hours exposure to water, but so far I see no problems.

www.Deluxematerials.com

This company actually recommends those two glues for model boats.

1-hour Epoxy for Glass-fibre/Glass-fibre and/or with Brass.
Fusion for all other types of polymers and metals.

I have also used a high viscous Cyanoacrylate for fast fixation of a rubber gasket to Aluminium. Still the fixation is absolutely bomb-proof.

Also Stabellit Express should be excellent under water.

Hope this may help you.

Anders