I have a single CAI, I once wrapped it in silver foam backed adhesive insulation I got from Home Depot using some silver insulation tape.
The end result was that it slowed down the heat soak and the IAT ran cooler for a period of time, but after 20 minutes or so it didn't matter.
It was so ugly looking, I took it back off.

I went so far as to buy an extra H.E.A.T pump ( the one that circulates coolant with the car turned off ) and was gonna buy a small intercooler radiator and some copper pipe and wrap the pipe around the CAI.
During all my research, I found that lowering the intake air temperature a few degrees made no drastic difference in HP, only if you can get it in the 40 degree and below range does it matter. This, I decided, was a low return for effort project and dropped it.