Just bought a 4by5 mat of PSP and the plan is to mount it to the back wall so I will cover it and be like purple grass. I tried super clue gel and it worked ok but the is parts that aren't sticking. I tried puddy and small rock pieces and that didnt work. Am looking for ideas to hold it to the back wall until it grabs hold by itself. Any help I appreciate.
Here is a shot of it now
Here is a shot of it now