We discussed that and he said it is 0.003" thick and I believe it to be a radiant heat coating and that it would be susceptible to heating by convection.

My mylar has shown that Iam getting between 4 to 10 degrees rise - total- from the front of the radiator ( ambient air temp) to the inlet to the supercharger ) which is a function of driving. Probably made over 40 trips to see the performance and heating in the last week and playing with the dash dac data logger. THat is a real nice piece of equipment that Rob sold me - way back when.

Enjoy Woody