Painting external boiler flue

Fine Cheers

Just got external balance flue re-routed with new white plastic coated piping and want to paint black or dark grey. Has anyone done this or can recommend a paint spec ?

listermint

DIY KING wrote: »

Just got external balance flue re-routed with new white plastic coated piping and want to paint black or dark grey. Has anyone done this or can recommend a paint spec ?

Any high temp paint will do. There are various BBQ paints that will also do the job spray or in can. Blacks a good choice.

Fine Cheers

Thanks for that. Bit worried about adhesion to plastic, any need to prime or might roughen up a bit with light sandpaper ?

Dtp1979

DIY KING wrote: »

Thanks for that. Bit worried about adhesion to plastic, any need to prime or might roughen up a bit with light sandpaper ?

Only the manufacturer will answer this for you. You prob don’t need high temp either if it’s a condensing boiler.

Johnthemanager

DIY KING wrote: »

Thanks for that. Bit worried about adhesion to plastic, any need to prime or might roughen up a bit with light sandpaper ?

Does it get hot?

Fine Cheers

No, doesn't get hot. Balance flue concentric pipe so outer chamber sucks cold air in and central chamber blows fumes out. Will get warm I guess at outlet grill though I'd say.

Johnthemanager

DIY KING wrote: »

No, doesn't get hot. Balance flue concentric pipe so outer chamber sucks cold air in and central chamber blows fumes out. Will get warm I guess at outlet grill though I'd say.

An adhesion primer like Zinsser 123 would probably be safer, and the 2 coats of gloss.

Dtp1979

DIY KING wrote: »

No, doesn't get hot. Balance flue concentric pipe so outer chamber sucks cold air in and central chamber blows fumes out. Will get warm I guess at outlet grill though I'd say.

Plastic balanced flue?

Fine Cheers

Plastic coated steel I'd say or maybe just a paint coating.