Ultra seal is TOP stuff!!
Although you can never guarantee what its done until you remove the tyre to check to see if there are dye stains anywhere I can certainly tell you a story which is based upon my experience and which has persuaded me to always use it.
On many trips I have not used any form of sealant, just relied on quality tyres and H/D Tubes. Although I have been mainly lucky I have had regular punctures, especially when riding hard off road.
Last year three of us went over to the states to ride the trans am trail (east to west coast off road, see www.no2-online.net).
1 ktm640 and two xr400 hondas. We were light weight, had little time, and rode light and very agressively. Between three bikes over 4 weeks we rode 15000 miles over every imaginable type of terrain.
We rode it all.
Despite changing eight tyres between the three bikes and trashing numerous chains/sprockets we had not one puncture or slow flat during the trip. Each XR bike had £20 of Ultra Seal installed in H/D tubes and the KTM had it installed in normal tubes.
An outstanding (and bloody unlikely) occurance. I cant prove that the Ultra Seal was responsible but I'll certainly be using it again.
Except for using mouses, using it together with good tyres and tubes is my personal bet for apuncture free trip.
Best Of Luck
[This message has been edited by davidlomax (edited 18 May 2004).]