Installation of <a href="//commons.wikimedia.org/wiki/Firestop" title="Firestop">firestop</a> samples. <a href="//commons.wikimedia.org/wiki/Ceramic_fibre" title="Ceramic fibre">Ceramic fibre</a> is being used as packing, to be finished off with Nelson CLK <a href="//commons.wikimedia.org/w/index.php?title=Silicone&amp;action=edit&amp;redlink=1" class="new" title="Silicone (page does not exist)">silicone</a> caulking. To the left, the penetration is sealed with Nelson WRP (mineral foam) and Nelcon CMP, a <a href="//commons.wikimedia.org/wiki/Mortar_(firestop)" title="Mortar (firestop)">firestop mortar</a>.
<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>