What to repair this black layer with?

[Pie&Chips]

Hi all,

I have taken the skirtings off a late 60s/early 70s building and in some areas there was damage caused by the nails as seen in the picture. I am filling these with a rapid set cement based mortar.

The question I have is that there is a smooth, rubbery feeling black coating that roughly extends up the wall 2" which I assume to be a liquid damp proofing.

Would the Black Jack DPM by Everbuild be the correct product to paint over my patched holes?

Is there something more suitable you could recomend? I have no building experience so am unaware of the products in this area.

Thank you for any help or wisdom you may be able to share!
Chris

 

[footprints]

Yes something like you suggest similar to Synthaprufe should do.
https://www.wickes.co.uk/Ikopro-Synthaprufe-Trade-Damp-Proofing-Liquid---5L/p/151384

Or one of the bitumen roofing repair products with fibres in might be another option.

 

[Pie&Chips]

Thank you, I managed to pick a tin up today.