When raining it sucked in more water than a camel
Got a gallon of FABSIL and treated the top to 2 coats of said liquid gold, in total about just over a litre.
Think the picture shows how well it has worked, no ingress at all. Really pleased with the result for less than an hours work and under £25 ,,,, best thing I've done so far..
Onwards and upwards to the next item to be looked at after all, it's all character building