<a href="//commons.wikimedia.org/wiki/Thermal_insulation" title="Thermal insulation">Rockwool</a> Type Roxul RXL 80, scanned in at 1600 dpi, with the grain. Rockwool is a common component in <a href="//commons.wikimedia.org/wiki/Drywall" title="Drywall">drywall</a> assemblies, spray <a href="//commons.wikimedia.org/wiki/Fireproofing" title="Fireproofing">fireproofing</a> plasters and as packing in <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestops</a>. The RXL 80 is an 8lbs/ft³ density board.
<a href="//commons.wikimedia.org/wiki/User:Achim_Hering" title="User:Achim Hering">Achim Hering</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>