Insulating a Clam Denali 4

[IndyEFI500]

Just wondering if anyone has come up with a good and easy way to insulate a non-thermal Denali?  I have one that rarely gets used but maybe would use it more if I could insulate it. What are your thoughts?  

[that-guy]

Reflectix from any local building supply store will get it done.  Cut to fit and zip tie in place.  You'll also benefit from a much brighter experience once you put on a light.