Image:Intfirestop.jpg

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[edit] Summary

Intumescent putty, permanently pliable, used in a cable penetration firestop. Permanently pliable putties are similar in consistency to play-dough used for children's toys. Putties of this nature also lend themselves to be used as pads to cover electrical outlet boxes inside drywall assemblies required to have a fire-resistance rating. The endothermic and insulative action of the pads reduce thermal transfer through the metallic outlet box to the unexposed side of the rated drywall assembly. All intumescents must be installed in a manner consistent with bounding requirements.

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