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Hi everyone this is my first post. based on the guidelines of Adesh I am making a 3d background using Tharmocol and cement. My first coat was nice and neat. I let it dry for more than 12 hours and in the morning I applied one more coat with thick paste. Now its almost dried and the dried cement is started to cracking and the cement is not holding to tharmocol.

Experts please help me I need the cement to stick to the tharmocol.

You need to make rough surface of thermocol before apply cement.

Spray water regularly after interval of 30 minutes up to two days.

Check here one more DIY background http://aquapetz.com/viewtopic.php?f=20&t=2289