Joint Sealing where the wall meets the ground?

[Udhi]

Hi all,
A neighbour has used a grey paint or sealant along the joint where his house meets the pavement.

It shows no sign of plants growth and seems like new after at least 5 years.

I want some!!
What is this compound? Best brands? Is there anything wrong with using this?

Simple answer is to ask him but I would only get one brand or recommendation with no caveats.

Any help please?
U

 

[Wayners]

Polymer mastic like CT1 and you can get in colours.
Maybe that was used

 

[23vc]

Ask them then come back here for options. If you think it might be a paint, it’s probably not a cartridge gun applied thing like CT1