Stuff in the empty crevices with reflux?

[Trekking]

I have two monster rolls of reflux and I was wondering about stuffing it into all the little crevices, over the tire well in the van. Or am I better just cutting up Foam board and stuffing it in there?

 

[GrantRobertson]

Do you mean "Reflectix"?

 

[LeeRevell]

Reminds me of a Navy buddy's van, that after a night partying in town was christened "The Chunk Wagon"......

 

[GSSP]

I use foam