uh... i dont know why it isnt slippery. I've used lexan and it's extremely slippery, well, not too slippery but its just like a normal box on a mtn. I'd say once your done building it you should hit it, im sure it'll slide nicely. Dont mess with it until you hit it a couple times, and if you do do anything only put water on it, i'm sure that waxing it would only make it slower.