Back in 2017 I got a small crack in my Morgan's screen 36 hours before I was about to go on a week's trip to the Yorkshire Dales. With no time to get anything else sorted out, I went into Halford's, bought one of these kits and used it.
It worked really well, the repair is still invisible to this day. The trick is to follow the instructions absolutely and to make sure you do the repair quickly before dirt has had a chance to work its way into the crack.
