High temp varnish

[duncan webster 1Participant @duncanwebster1]

During the depths of lock down I retrieved a stalled project, a 5" vertical boiler, and fitted wood cladding, then it stalled again! Now I want to varnish the cladding. It will get at least warm, so what type of varnish do I use? The water based stuff is easy, but will it stand the heat

[duncan webster 1Participant @duncanwebster1]

[Brian WoodParticipant @brianwood45127]

Duncan

Try Bourneseal, if you can buy a small quantity, it is not water based and should be good to at least 80 C

Regards Brian

[John RuddParticipant @johnrudd16576]

Duncan,

You could use varnish as used for transformers and motors from Brocott.co.uk

 

https://brocott.co.uk/electrical-insulating-air-drying-varnish-250ml-clear/

Good for temperatures in excess of 100C and they sell in small quantities…

Edited By John Rudd on 17/02/2022 12:58:07

[BazParticipant @baz89810]

At the start of lockdown I bashed out a couple of small vertical gas fired boilers and lagged them with the usual wood strips. The only varnish I had available at the time was Ronseal polyurethane satin so they both got a couple of coats of that. Both boilers have been steamed for the amusement of the grandchildren on at least a dozen occasions and the varnish is as good as the day it was applied, The varnish is turps / white spirit based, not the water based stuff.

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