Firestop mortar, starts as a powder, is mixed with water, forms cement stone, dries hard, is often leavened with lightweight aggregates, such as perlite or vermiculite and pigmented to distinguish it from generic materials in an effort to prevent unlawful substitution and to enable verification of bounding.
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{{Information |Description=Firestop mortar, starts as a powder, is mixed with water, forms cement stone, dries hard, is often leavened with lightweight aggregates, such as perlite or vermiculite and pigmented to disti
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