I used type B2 slag in a river rock bed to make it walkable and somewhat
cleanable with a leaf blower. Two years and it has worked well. The only
problem, if you want to call it that, is some of the river rock has managed to
emerge from the surface.

I'm not sure what B2 slag is. Do you happen to have a link so that I
can see what it looks like? What type of business would one purchase
this from? I'm in central BC, Canada so I need a push as to what type
of companies to approach..

Thanks so much!