We had Amtico flooring put down by an approved fitter last year and we asked him about using a steam mop we had just purchased.... he said not to use it on Amtico flooring...So its still in its box under the stairs!
A quick google and Amtico.com seems to say the same thing as the fitter.
AFAIK its the same kind of stuff as Karndean.
We did also ask the fitter about maintenance, and from what I remember you can get proper cleaning/restoring and polishing products if need be. And companies that come out and 'restore' the flooring apparently!
Mick
Can I use a Steam Mop or Steam Cleaner on Karndean Designflooring?
If using a Steam Cleaner on your Karndean floor, please check your manufacturer's guidelines to ensure it's suitable for use on Karndean. To clean your floors with ease, Karndean manufactures its own cleaning and maintenance system which has been specifically designed to retain the original aesthetics of your floor without causing damage. For more information about how to care for your Karndean floor please download our Floor Care Guide.