Loctite underwater - which ne to use?

[Simpo Two]

I'm fitting a two-part weed cutter to a propshaft tomorrow and have been told to use Loctite on the fixing screws.

My local shop sells only one kind, '243 Loctite Lock 'N Seal'. It say 'Medium strength - easily undone with normal hand tools'

As the job is is (a) underwater and (b) if it falls off I've lost £80, is this Loctite the correct one please?

[mat13]

Would a quick blob of weld on the end of the bolts be better? Then use an angle grinder to remove.

[Simpo Two]

No mains, no welding gear, no idea how to weld. Other than that

[ChrisnChris]

Some use it for the screws for bindings on skis so it has waterproof qualities.
Sufficient for your task...?

[Simpo Two]

Hmm, just spoke with a good chandler/boatyard and they say it should be OK, or that I can use Araldite (but then it would be stuck for good - so if I sell the boat or need a new propshaft the cutter goes too).

I'll sleep on it!

[The Nur]

I love Araldite

The only glue that could be described as being a bit too extreme

[Simpo Two]

It does raise the posibility of getting some in the cutlass bearing, so that when I put the boat in forward gear the prop stays still and the boat spins around the propshaft... like Gromit in 'A Grand Day Out'

[weezb]

The Nur said:

I love Araldite

The only glue that could be described as being a bit too extreme

IIRC it has been used to join bridges together.

[The Nur]

weezb said:

The Nur said:

I love Araldite

The only glue that could be described as being a bit too extreme

IIRC it has been used to join bridges together.

Got a link? I want to see that

[weezb]

The Nur said:

Got a link? I want to see that

Don't know if this direct link will work

http://www.huntsman.com/advanced_materials/index.c...

If not, then on huntsmans' site go through "construction" on their menu > applications, it's in there.

[The Nur]

Awesome

[MOTORVATOR]

On mine it's holding a pair of props with 550hp detroits on the end of the them Simpo so you might just get away with it.

But seriously yes it's waterproof but not for suitable for immersion in oils etc.

[Simpo Two]

MOTORVATOR said:

On mine it's holding a pair of props with 550hp detroits on the end of the them Simpo so you might just get away with it.

With a dizzy 35hp I could probably get away with Sellotape!!

[MOTORVATOR]

Simpo Two said:

MOTORVATOR said:

On mine it's holding a pair of props with 550hp detroits on the end of the them Simpo so you might just get away with it.

With a dizzy 35hp I could probably get away with Sellotape!!

What you need is a waterproof tape.

http://www.sylglas.com/products/wptape.htm

[Mojocvh]

Bugger.

something else I've lost since the PC crash, all the latest loctite pdf references.

Double bugger.

http://hybris.cms.henkel.com/medias/sys_master/847...

Edited by Mojocvh on Thursday 24th March 09:16

[Simpo Two]

Never mind, it's on now and all seems well. The gap was 20mm and the cutter 14mm so we have 6mm clearance for water flow.

Just a pity that the tiny tube of Loctite, which was £3.60, was 90% air so disgraceful value.

[Hooli]

The Nur said:

I love Araldite

The only glue that could be described as being a bit too extreme

It does fail though, heat & vibration will kill it. So don't try sticking thermocouples into metal water pipes for your cars rad - it'll fall out.