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white radiator turning yellow

Joined
27 Oct 2003
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United Kingdom
I recently re-painted a radiator. I used DULUX pure brilliant white undercoat and gloss. 4 months later and the radiator has turned cream. I used the same paint on the window sill above and it's still white. Any idea why this has happened?
 
If the radiator has been on, the heat, conduction, will turn the white to yellow. Do not know what the exact term or chemical equation is.
The heat from the radiator to the sill, convection, will eventually turn the sill yellow, but not as quick as the radiator.
You can buy special radiator paint to combat this from any DIY store, but be aware, the fumes are horrendous during the paint application.
 
Oops, I forgot to mention the most puzzling part...

I also did the skirting and the radiator pipes. The radiator pipes are still the same colour as the skirting behind them - brilliant white.
 
it sounds like some kind of bleed through from the yellow underneath. You may need a different primer.
 
it sounds like some kind of bleed through from the yellow underneath. You may need a different primer.

Oh, that makes more sense. It was painted cream previously. Can you suggest what primer would seal the old paint?
 
If the radiator has been on, the heat, conduction, will turn the white to yellow. Do not know what the exact term or chemical equation is.
The heat from the radiator to the sill, convection, will eventually turn the sill yellow, but not as quick as the radiator.
You can buy special radiator paint to combat this from any DIY store, but be aware, the fumes are horrendous during the paint application.

HI,
I agree with this idea and that's true that through heat and weather condition,All thing will became damage if heat and weather condition will occur.
 

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