I think your Kawi will be fine if you throttle it down. It might be just right someday when you have that 3300 gallon Finn. :-)
For slopes we use EcoFibre plus which is a wood mulch with a guar based tack that is made by CanFor products in Canada. On real steep slopes we use EcoAegis,a bonded fiber matrix by the same company.
On flat ground we use a product called "astromulch" which is recycled newspaper and it is made in Anchorage.
They are about the only thing available up here.