Have you seen it installed; it reads really nice.
No it is brand new and not used here yet! However I have seen BlueSkin which is pretty good if you don’t expose it to the sun for too long.
It does say it should be covered ASAP.
Many new products out there. I installed this under my roof last year.
Read the difference in weight on only 7 mils thick. Burst strength 130 psi. Temperature range of -55 C to 100 C
I used my divider and that is actually 90# underlayment.