What's heatproof, waterproof, and acts as an insulator?

Kelpie

Kelpie

Well-Known Member
Joined
15 May 2005
Messages
7,766
Location
Afloat
Visit site
Apologies if you were expecting a punchline to that title.
I need to form a spacer to raise the screw down vent over a heater outlet. Previously this had been done using a disc of white fibrous board (vermiculite?) which over the years had disintegrated. It pretty much fell apart when I took it off, and it explained one of the leaks I had been suffering in that part of the boat.
I need a block of something to raise the brass vent cover by about half an inch. I expect wood would not be happy in proximity to the flue outlet. Metal seems like overkill and would not insulate the hot vent cover from the fibreglass deck. Any other suggestions?
 
Make a ring (mould) in wood, whatever to the outer diameter and depth that you want. Fill it with heat resistant silicone, let it go off. Break the mould, job done!
 
In another life ..... 1960's..... I had to heatproof, waterproof and insulate some electrical components in an out of the way situation where a very remote recording instrument read the flow of black water from a very large site.

I suspect that the temperatures you are speaking of, are in excess of that which I was faced, but my story may bring back some memories of bygone days for some of the old gits out there who 'served time'...... I was an apprentice instrument mechanic.

For years the instrument department where I worked, experienced problems with moisture getting into cables etc and erratic reading and recording were made to a strip chart recorder.

I came up with the idea of drilling out a cube of Tufnol, threading all the cables through drilled holes and having the electrical cables terminate within on a terminal block. http://www.tufnol.com/tufnol/default.asp?id=34

In very warm and dry conditions I filled the opening to the tufnol block with Araldite, completely engulfing all the cables and terminal blocks inside. When set we took the very long cables to the site, connected it all up and it was still going over two years later even though it was open to all the elements all year round.

:)

S.
 
Last edited:
Any builders merchant will have a non asbestos heat proof board that is used for lining gas fire enclosures and the like. It has a trade name that I've forgotten. You might be able to get a broken bit if you don't need a 4 ft square sheet. Or try a gas fire installer for an offcut.

It's Asbestolux.
Or you can get vermiculite board - Vitcas.
 
Last edited:
Graham_Wright said:
The last piece of 12 mm thick PTFE was £432.50 for 1200 X 1200. Unfortunately, I still have it as the customer demised!
Click to expand...
PTFE melts (softens with heat) that's why we don't use it in bearings that will run hotter than 50-60C. I'd be thinking Vitcas or possibly
Phenolic electrical insulation board but check the break down temperature as there can be nasty fumes if they are cooked.
 
I suppose my other option would be to take vermiculite board (as was originally installed) and just protect it against the weather by painting it...
 
Asbestolux was produced by Cape Boards and Panels and was superseded by Supalux which did not contain asbestos. All asbestos insulation board was banned from production or import from 1982.

I can't imagine that a trader would be wise to call any new product Asbestolux!

Troubadour said:
Asbestolux is non asbestos, at least now - see my post #12.
Click to expand...
 
You must log in or register to reply here.

Share this page

Top