Usage patterns
〈物〉は樹脂製だ〈thing〉 is made of resin
This case is made of resin and is lightweight.
樹脂を塗るto apply resin (as a coating)
They apply resin to the wood's surface to protect it.
樹脂が硬化するresin hardens/cures
This resin hardens in just a few minutes.