g4321 is right in my opinion the stuff is a waste of time & bloody messy.
I guess you're worried about punctures in the SSDT. From what I saw last year & what other people had previosly told me the main problem is getting front punctures going down the forest tracks. Despite the fact that I was knackered most of the time there was realy no option but to stand up whilst going down the tracks, the added height means you can see the pot holes / rocks sooner. Also don't go like a loon across some of the rougher moor tracks, Mamore road for instance.