Reply to #21
Change of plan - I'll now be taking the Flashband back to Screwfix and picking up some Sikaflex instead :)
I'd be careful which sleeping mat you select as I've tested pieces from three different budget types and they all soak up water.
How about some self adhesive neoprene from eBay?
Reply to #23
Good point about the waterproof element of the mat.
I've decided to give this one a try for £7
#25. Chris that looks like quite a good quality mat and May well be more waterproof than the ones I tested so if you're determined to go with that system then give it a go, it'll probably be ok as most of the time our cars are used on dry days only, when I do mine I'll be painting on the rubberized underseal as it'll be much easier than cutting, shaping and sticking and it can't fall off.