"RichToyBox" wrote in message
news:nnu7b.404297$YN5.267845@sccrnsc01...
There are two main types of materials used for mortaring or grouting
stones
on waterfalls and streams that seem to work. One is a foam called Great
Stuff, which is injected between the stones after they have been dry
stacked. It expands and will bubble out of the joint area, but it is
easily
cut with a knife to get the shape that you would like. It is a yellowish
color, but can be darkened by burning the surface with a torch, smearing
with soil, or applying dyes. They make a black foam also, but it is much
more expensive. These foams are flexible and allow some movement of the
soil without losing integrity.


Has anyone tried to just paint the foam with black latex house paint? That
should be waterproof, and is water washup for you brushes.

I'm sure you could use regular acrylic paint, but I'd think latex house
paint would last longer in the elements...


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