EXTREMELY EFFECTIVE - reflect 97% of radiant energy, perfect RADIANT BARRIER. R- value up to 15.67 ( with one layer), up to 20.10 ( with two layers).Looks like a nice alternative at an affordable price. If it was installed doubled you would still be under half an inch(10mm). And R 30 plus a possible mini dead air space.
Have you tried soaking it? Does it hold water? Says it's closed cell.
I have never seen this stuff, is it new?
bill
VAPOR BARRIER - Unaffected by humidity and moisture, mold resistant can be used outdoor/indoor.
SOUND BARRIER - excellent sound deadener material.
SUPREME QUALITY - 5 mm closed cell polyethylene FOAM (not a cheap bubbles) sandwiched between PURE ALUMINUM (not a polyester film) on both sides. Easy to install, easy to cut. Strong but lightweight.
FIRE RATE - Fire rate Class 1 / Class A, NON TOXIC - will not irritate skin, eye or throat. Non allergic.
Be advised that this has a double aluminum sides, I used spray adhesive and hardcast tape to keep it secure and created an air barrier between interior space and exterior walls.
By no means am I a professional but this works IMO