Wheel arch underseal

While the silicone fumes are fresh.....
This stuff is nasty, but don't notice it after an hour when your head is spinning. 2 coats/2 days. Open the doors!
One Tub is enough for all 4 arches, nose area and a 2nd coat on the under side of upper body.
Can be found in B&Q in the roofing section.
Idea is that this applied to the underside of the arches helps prevent stones from impacting hard enough to cause crazing/cracking in the gel coat finish.

I had tried some proper car underseal but it was awful to apply and didn't coat well.
This however still needs to be warmed up and stirred well but has a consistency of thick treacle and can even go on with a roller if you want but covers thicker with a brush.