Quote:
Originally Posted by Gert-Jan
Hi,
I used expandable foam for bulding a rock back ground in my desert ter,
But i had a lot of 'air bubbles" in it.
How do you get such a fine structure on those root systems?
just aply pressure when you spray it on the wires or something like that?
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Hi there.
I don't know if some foams work better and some worse. But I have noticed that when you spray thin layers and let them dry, you get smaller airpockets as well. Apply several layers, if needed.
If you use grout or any other cement-based stuff, you don't have to worry about the holes. They are filled with the stuff you use, when you brush it on.
Here's another branch project of mine:
Basic structure, pipes glued together with hot glue, a couple of plastic bottles cut for pots:
PU-foamed and thinner twigs made with stainless steel wire:
PU-foam carved:
A couple of layers of grout brushed in, twigs filled in with vinyl string soaked in grout, grout carved a bit:
Brownish bottom layer dried up and a darker surface being brushed in:
Shaded with dark, almost black hue and pretty much finished:
(The greenish stuff is acrylic polymere, which turns green before drying completely and turning colorless)
And finally, after a month of keeping wet to let the cement harden, in a tank:
Sorry for the lousyish pics, I'm no photographer.