VAPOR BARRIER - Unaffected by humidity and moisture, can be used outdoor/indoor.
SUPREME QUALITY - 3mm closed cell polyethylene FOAM (not a cheap bubbles) sandwiched between PURE ALUMINUM foil on both sides. Easy to install, easy to cut, Strong but lightweight.
SOUND BARRIER - excellent soundproofing material.
FIRE RATE - Fire rate Class 1 / Class A, NON TOXIC - will not irritate skin, eye or throat. Non allergic.