The mineral wool used to produce the core of a FIREZERO-MULTI SOCK Cavity Stop Sock is non-combustible to BS476: part 4: (1984). Our product testing has been carried out both vertically and horizontally by Chiltern International Fire and is covered by test certification CHILT/IF06028 showing vertical applications and CHILT/IF06027 showing horizontal (internal walls only for external walls see FIREZERO-LEVEL data ref 27 applications. ).
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