(12 Pk) 1"x12"x12" Blue/Charcoal Soundproofing Foam Slim Acoustic Foam Wall Panels Tiles Studio Foam Sound Proof Padding - Enhance Sound Quality by Absorbing Noise and Echoes (6-T)

Less than 90 days. Foam panels were installed out of any direct light source inside away from any temperature variance. I can't determine if the charcoal panels discolored as well. Very displeased with the product. I've sent same information to seller with no reply this far ( 5 days ). Rating for adhesion, absorbency don't apply. Noise level appears to be better.