According to Gorell, the R-Comfort reflective insulating products are by-products of the U.S. space program and similar to the material used for space suits. Made completely of nontoxic, hypoallergenic materials, all R-Comfort insulating products feature a pure aluminum facing that’s flame-laminated to an impermeable closed-cell polyethylene material that can also act as a vapor barrier. They are designed to be installed over attic joists and rafters and around the exterior walls of homes before siding is applied. Links:
[1] http://www.gorell.com/