Thread lock in wet

[Halo]

I am going to get her pressure washed next week and want to change the prop anode. This needs thread lock. I only have 2 hours out of the water. Does anyone know if blue loctite washes out or another way of sorting the problem without buying an original anode with a pre prepared coated bolt ?

 

[R.Ems]

I am going to get her pressure washed next week and want to change the prop anode. This needs thread lock. I only have 2 hours out of the water. Does anyone know if blue loctite washes out or another way of sorting the problem without buying an original anode with a pre prepared coated bolt ?

The thread lock will be fine, it just likes well-tightened nuts which make it set quickly enough by squeezing out the air, rain etc. Warming up the fittings couldn't do any harm though, to give you a bit of extra peace of mind.
You will need heat to get the fastenings to undo anyway.
Loctite etc is cheap, you don't need to use a tiny drop, there is no reason to be economical...slap it on!

 

[fredrussell]

Loctite sell an accelerator spray to speed up the ‘drying’ time. I emailed their parent company a few years back to ask if their loctite products would go off under water - I needed to lock a bolt on a Kiwiprop- and they said no, it’s not designed to cure fully underwater. That said, there’s plenty of reports of it curing underwater - Neeves of this parish reports it working well on anchor shackle pins in just this way. I wouldn’t trust it ‘water cured’ for a critical application such as my prop, but for an anode I’d say it’ll be fine.

 

[vyv_cox]

On deck it sets very rapidly by exclusion of air, it is a form of superglue. Once set it does not deteriorate under water. Before I began using it on anchor shackles and fittings I tested it using a torque wrench.

 

[Neeves]

Loctite sets under water without any loss of strength. It actually needs water to set.

Adhesives Test - Practical Sailor

I actually used blue Loctite on prop fittings underwater. My wife loaded the components with the Loctite and I carefully inserted them under water - set like concrete.

If you want to release, whatever, do not use red Loctite - you will need heat to release it.

Jonathan

 

[Halo]

Thanks for the helpful replies chaps!

 

[superheat6k]

For medium strength 242 or 243 both blue, where 243 is slightly oil tolerant. For high strength 270 green, but do not use too much of any of these if you might want to undo the fitting in the future. For threads which need a seal 577 really is the best thing since sliced bread.

All work by anaerobic action - i.e. they set once the oxygen is removed and the set is very quick.

 

[Neeves]

For medium strength 242 or 243 both blue, where 243 is slightly oil tolerant. For high strength 270 green, but do not use too much of any of these if you might want to undo the fitting in the future. For threads which need a seal 577 really is the best thing since sliced bread.

All work by anaerobic action - i.e. they set once the oxygen is removed and the set is very quick.

I once used red Loctite on a long thread. I have 2 x long adjustable spanners.maybe 500mm each - I could not break the thread. Easy once you use heat - but often you do not have heat. Be careful what you choose. I suspect if you used red on a small say 5mm Alan keyed bolt you would breaker the key before the thread released.

I've never used green.

Jonathan

 

[William_H]

Bit of fred drift but I have winches on cabin top. Quite small single speed witha bolt down the middle to hold them together. Bolt keeps coming loose. Can I use super glue on thread? Will I ever get it loose again? Can't imagine how I could get heat inside to release glue. Should I try to find loctite locally? ol'will

 

[Skylark]

Should I try to find loctite locally? ol'will

Loctite (Henkel AG, Germany) makes a huge range of product widely used in industry. Threadlocking being just one. Here’s a copy of the relevant page from their exceptionally useful “Solution Guide”. Hope it helps direct you towards the right product for your application.

 

[Neeves]

Bit of fred drift but I have winches on cabin top. Quite small single speed witha bolt down the middle to hold them together. Bolt keeps coming loose. Can I use super glue on thread? Will I ever get it loose again? Can't imagine how I could get heat inside to release glue. Should I try to find loctite locally? ol'will

Bunnings sell Loctite usually only a few formulations like 2 or 3. Just stick with blue.

If you are colour blind - heat the head of the bolt.

Jonathan

 

[superheat6k]

Bit of fred drift but I have winches on cabin top. Quite small single speed witha bolt down the middle to hold them together. Bolt keeps coming loose. Can I use super glue on thread? Will I ever get it loose again? Can't imagine how I could get heat inside to release glue. Should I try to find loctite locally? ol'will

For that application I would use 242 or 243 and only a small amount. If it still comes loose then a small amount more. NOT 270.

 

[Portofino]

Something new here , the white wax paste stuffed into where the prop anode bolts goes .Any one any idea what it is ?
Yard have done it , what ever it is ?
It still there after 10 hrs btw .


The port one used to loosen even with loctite 243 blue .I used to tighten it up mid season .
The props spin outwards so the port turn anti-clockwise = loosens as it erodes .

Guessing (actually hoping ) the white wax is something to prevent the anode bolt loosening ……..or what ?

 

[William_H]

Thanks all re loctite ol'will