DIYbanter - Overpainting black bitumen paint?

On 04/12/2015 11:54, wrote:
David, Did you find a answer that worked as I have the same problem. Chris

Aluminium Primer?
http://www.duluxtradepaintexpert.co....sheets/204.pdf

http://tinyurl.com/pkae5rx

20+ years ago when I renovated my house most of the paint work had an
undercoat very much like tar. It appeared to be rather sticky even when
left for many weeks. A lot of hard work got it most of it off and a
coat or two of aluminium primer has stopped any bleed coming through
white painted surfaces.

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