Protective paint for hot bits?

[Helga]

Further to my last post, whilst under the van I noticed pealing paint on hot areas, heat exchangers etc... is there any protective paint I could use on those areas? Thanks!

[toomanytoys]

Yes, but without removing the parts, sand blasting and painting them it aint gonna stick either... so maybe a wire brush and some cheap spray for BBQ's would offer some protection.... for a bit...

[Helga]

Not some sort of cheap engine paint then?

[toomanytoys]

If it will do a reasonable temp, then yes... exhausts get hot.. any of the shoudings will get hot too.. maybe in winter when the heating is "on" the cool air passing through will prevent the items geting so hot, but in summer when the heating is off.. the air cant go anywhere really.. it will get hot..

[Helga]

Paint which says up to 240 degrees c, would that be ok?

[Oldiebut goodie]

Shamelessly copied from the Web!

Appliance type Exhaust Temperature
(oF) (oC)
Chemical Oxidation 1350 - 1475 730 - 800
Annealing furnace 1,100 - 1,200 590 - 650
Fluidized-bed combustor 1,600 - 1,800 870 - 980
Natural-gas fired heating appliance with draft hood 360 182
Liquefied-petroleum gas-fired heating appliance with draft hood 360 182
Gas-fired heating appliance, no draft hood 460 238
Glass melting furnace 1,200 - 1,600 650 - 870
Oil-fired heating appliance, residential 560 293
Oil-fired heating appliance, forced draft over 400.000 Btu/h 360 182
Conventional incinerator 1,400 760
Controlled air incinerator 1,800 - 2,400 982 - 1,316
Pathological incinerator 1,800 - 2,800 982 - 1,538
Gas turbine exhaust 700 - 1,100 370 - 590
Diesel exhaust 1,000 - 1,200 540 - 650
Ceramic kilns 1,800 - 2,400 982 - 1,316

So I would say no

[campervanman]

Type VHT into Google.
You will get paints such as supplied by Sperex that will take temperatures up to 1000 degrees C depending on colour.
They usually need to be heated up to cure them before they are full effective - run the engine to get the exhaust hot.

[Bowton Lad]

It is possible to buy aerosols of Very High Temperature exhaust paint which must be applied to bare metal. Any primer or existing paint must be removed.