+1
I've used it in all my touring wheels and it def extends tyre life, think this is due to the cooling effect
it has by constantly having liquid flowing around the inside of the tyre. Also, I'm not sure if anyone else has mentioned it but it also inproves stability by adding to the spun weight of the wheel therefore increasing ''centrefrugal'' forces, the thing keeping you upright in the first place.
Having said that, its probably all bollocks, but it does give you peace of mind that your tyre isnt going to blow out so worth 20 quid for that alone i recon.
But thats just me & any one who likes ultraseal its fine
Me i like the small pump & plug kit i use, no cost till needed & can use on other bikes if you are in a group of friends (dont like leaving mates stranded)
I have had 2 tyres go down in 7 years, how many tyres would i have put ultraseal in in that time