Over the last week or so I've been converting an Oceanic Lizard Lounge chameleon tank into a new Crested Gecko setup. My plan was to make a fake wall for the background. Well I followed the steps and covered the back wall with Great Stuff spray foam and let is set for a few days. After that I coated it with black silicon and while it was still wet I put a layer of dried coco fiber on it. I lightly patted the coco fiber and let it dry for 2 days. Well today was the day to set the cage up right. To my displeasure almost none of the coco fiber stuck the silicon. I'm royally pissed right now. I wasted $15 bucks on the silicon and it didn't even work. This is my first attempt at making a coco fiber fake wall so my question is what did I do wrong? The only think I can think of is that I didn't coat the wall thick enough with silicon or pat it down hard enough after applying the coco fiber. I was thinking about just buying 2 more cans of Great Stuff, spray it on the wall and then smooth it out. While it's still wet, sprinkle coco fiber on it. What do you think?