Covering soot - how to stain block?

[Saphina333]

Dear all
Have recently had a kitchen fire, the ceilings and walls are pretty black despite being cleaned!
What do I need to apply to the affected areas to prevent the black seeping through?
Cheers

 

[misterhelpful]

Zinsser B-I-N is the best at covering soot stains, and will also seal the smell of the smoke, but is a pain to apply over large areas. Their Coverstain product works well on milder soot stains, is easier to apply and a good bit cheaper, but doesn't have the same kind of odour blocking powers. Alkali resistant primer is also good but B-I-N is now the most popular option for its all round problem solving capabilities and super fast drying times (which is what makes it tricky to apply).

 

[ChrisR]

Before smelly special sealers came along it was oil-based undercoat, on a small roller. Not that it doesn't stink, but it doesn't make you high!

 

[Saphina333]

Zinsser B-I-N is the best at covering soot stains, and will also seal the smell of the smoke, but is a pain to apply over large areas. Their Coverstain product works well on milder soot stains, is easier to apply and a good bit cheaper, but doesn't have the same kind of odour blocking powers. Alkali resistant primer is also good but B-I-N is now the most popular option for its all round problem solving capabilities and super fast drying times (which is what makes it tricky to apply).

thank you - i had heard of this stuff, applying anything to the whole ceiling is going to be tricky!

might search to see if i have any oil based undercoat knocking about still!!!

 

[Robbie uk]

Or.. Knotting which is shellac based, this will seal most things.