Re: Spray foam question
I'd like to use the Great Stuff pond-formula (black stuff) in a corner waterfall Idea I've had. I'd like to know from all of you, what does the Pond Stuff stick to - and what does it NOT. Will it hold lava-rock chunks? Also would like to know if I used lava-sand dusted over the while thing right after applying, and pressed down into the surface - will the dust stick to the foam? Or do I have to use silicone anyway, to make it adhere? And what do you suggest I use as a "space filler" to leave a top-down open void in the corner to drop a small water-pump into? I'd like to be able to retrieve it and service it once in awhile - not entomb it in foam.