All it does is prevent you from identifying a puncture from a nail/screw/whatever before it causes a potentially catastrophic tyre failure. What's more no tyre repairer will mend a tyre once it has had this stuff in it - and if you get a screw in a nearly new tyre this can be expensive. Now BMW say don't use it because it will clog up the technology. And yet you still debate whether to use it 
Why anyone would want to pay to put this slime in any tyre is beyond me
I would suggest if you are want to repair a puncture use one of the many m/c repair kits availble - easy to use and make an effective temporary repair until you can get the job done properly and safely.
Peter
Where do you get your information Peter??? (caking myself in case I break the sensors - coward of the county!!)
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. Apparently he had ridden on a road where an accident had recently occurred and as a consequence the resultant debris on the road had punctured his tyre in several places which eventually caused the tyre to delaminate. The manufacturer argued that had he not used Ultraseal then the tyre would have been removed for repair and the full nature of the damage brought to light and the tyre rightfully scrapped.I had an interesting conversation a couple of weeks ago at a tyre fitters as my mate was having his changed on his 1150GSA. The tyres were removed and were full of Ultraseal and the proprieter of this establishment told me that manufacturers' warranties are invalidated with its use. He quoted a court case in which a rider had tried to take a manufacturer to court for injuries received after he had a catastrophic delamination of his tyre and a subsequent crash; the investigation showed that due to his use of Ultraseal he had 12 or 13 punctures that he was unaware of
