Best way to fill cracks- asphalt over felt flat roof

[Tim Brennan]

My FiL has a flat roof on his extension. We are looking for a way to fill in the cracks. Any recommendations?

Here’s a video showing a bit more

 

[Vondawg]

How about some elastomeric coating like on an RV ?

https://www.lowes.com/pd/APOC-243-4...Y5pDTyJu7GJAGqZBE8AUTA6r3WTJe77waAoLmEALw_wcB
Henry and Rust-olem makes simular

 

[Tim Brennan]

How about some elastomeric coating like on an RV ?

https://www.lowes.com/pd/APOC-243-4...Y5pDTyJu7GJAGqZBE8AUTA6r3WTJe77waAoLmEALw_wcB
Henry and Rust-olem makes simular

Thanks but I don’t know if that product is available in the UK