[Otto]

Originally Posted by BamZipPow

It's not cloroplast or chloroplast...
Corrugated plastic - Wikipedia, the free encyclopedia

If you experiment with Coroplast...you will see it might melt when it's within 1" of the exhaust system...

I protected my Coroplast with some aluminum flashing.

Also, could face or dress the coroplast near heat sources with aluminum foil adhesive tape. At hardware store, comes in rolls like duct tape. Protects the coroplast edge, dissipates heat from any hot spots.

Also, you could fill the holes cut in coroplast for muffler clearance with aluminum window screen, which lets the holes breathe and vent heat, but still smooths the airflow of the passing slipstream.