Remove 'bitumen' or not?

[Brad]

Afternoon all............

I am prepping a floor to take tiles. It is a screeded floor with ancient vinyl floor tiles that need to come up. Removing the old tiles reveals a black bitumen type adhesive. I have been informed that it is not a good idea to tile over this bitumen substance as the addy won't stick to it. Is this true? I would ideally prefer to avoid scraping the stuff off and just tile over it. Would a good rapid, flexi addy suffice? Any advice appreciated.:dozey:

 

[Gazzer]

A SBR/SPF adhesive slurry coat could be used

 

[Brad]

Could you expand? What is SBR/SPF adhesive? The only SBR I've come across is the Bal bond.

 

[Gazzer]

SBR is a primer like this Tradetiler Tilers Silicon and tools

Mix 50/50 and paint it over.

 

[Brad]

Then fix tiles as normal?

 

[Gazzer]

Yeah with single part flexible adhesive.

 

[bugs183]

Bal Bond is SBR, slurry as Siramic says above.

 

[judge]

Does the cement slurry primer mix work with polymer modified self leveler too? Laid at 10 mm.(sorry for buttin in brad)