On 12/11/2017 08:06, harry wrote:
On Saturday, 11 November 2017 16:28:51 UTC, Michael Chare wrote:
Is there anything better than black exterior mastic (frame sealer) to
repair a foot long crack in a bitumen felt roof? The crack is near the
edge where there is a lip to control direction of water flow.

Some has used what is now hard grey stuff to repair some previous
blemishes in the tiles. It is subsequently cracked.


--
Michael Chare

Flash band on top of bitumous mastic.
Use the flashband primer.
Best done in warm weather. Unfortunately.

I have used this on my felt shed roof with good results.
I believe it is bitumen with fiber particles to strengthen it.

https://www.screwfix.com/p/cementone...lack-1kg/57518