This is a Ruby roof. As Martin says, basically identical to the RP. This view is from the front and hasn't got the sliding gear on, but it's the best I've got to hand. Martin's photo will give you the right idea as to how that would sit.
I used Body Caulking supplied by Woolies.
Their words indicate it very close to dum dum which I understand was a product used in days gone by but is no longer available.
It does not solidify and remains pliable, and is water proof and can be painted but as noted previously I have left mine as laid.
Cheers Denis S