Thin screed on concrete steps

[john4703]

I've got 4 concrete steps outside a door and they slope backwards so rain water pools on them.
I'd like to add a very thin coating to correct the slope so that they stay clear of standing water, (my main worry is that they will be dangerous in the winter when the water freezes)
Is there any material that I can use to put a thin layer on top of these steps, it would be about 1mm at the front and between 5 and 10mm thick at the back.

 

[dazlight]

you could use
F.ball stopgap 850 exterior

http://www.f-ball.co.uk/product_detail.asp?product=850 Exterior&catID=smoothing

Not used it yet but heard good things.