I don't know about the product your referring to in particular but, alot of the more modern products have been using nano technology for sometime now.... Some companies brag and advertise the fact, others don't.

All the nano particles are mean't to do is help give a more even finish helping to mask or fill any minute imperfections and give a clearer reflection....

Theres mileage in this sort of thing for bodywork purposes to some extent but, things like nanotech tyre dressings and trim detailers etc, *I* think are just using the term and running with it to get people to buy 'the range' so to speak.

If your talking in terms of these long life sealants such as those applied by dealers, any decent sealant will do the same job, last about as long or can be reapplied easily, and will cost a lot less money.

Hope that helps a little .