Cycling in the ice - Spray

Cars seem to have sprays that apparently increase grip by applying a coating of resin. Something like this:
http://www.amazon.co.uk/Tyre-Grip-Black ... 659&sr=8-5
Could something like this be used on a bicycle? I understand there is very little contact patch on a road bike in the first place, but for the occasional black ice that hang around after the snow is gone it may work?
I don't suppose anyone has tried this?
http://www.amazon.co.uk/Tyre-Grip-Black ... 659&sr=8-5
Could something like this be used on a bicycle? I understand there is very little contact patch on a road bike in the first place, but for the occasional black ice that hang around after the snow is gone it may work?
I don't suppose anyone has tried this?
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so do something else for the two weeks that we have snow, or do nothing (and call them 'rest weeks' to anyone that asks) if you're not confident of going out and staying safe.
I suspect there is an element of the Emperor's Clothes and that it is just a con. I cannot see how a residual resin can improve on the shear grip between tyre and snow/ice. Even if it did improve the shear grip at the tyre/ice interface the snow and ice would slip on a different plane away from the tyre.
Reminds me of the spray which the maker claimed would stop speed cameras from reading your number plate. I watched a salesman try to convince a bunch of motorcyclists at the Scottish Bike show one year. He failed miserably.
FIFY
I guess you're right smidsy, in all honesty!