A 4-hour fire-rated mortar that provides superior thermal insulation and sealing for fire and smoke protection in walls and floors.
CharCoat FM is a dry, white powder composed of gypsum and perlite that, when mixed with water, forms a highly thermally insulating firestop mortar. Designed to prevent the spread of fire and smoke through openings in fire-rated walls and floors, it is ideal for sealing around building service penetrations like cables, pipes, and ducts. Its hydraulic expansion ensures a tight seal, while maintaining acoustic performance in treated structures.
CharCoat FM is a dry, white powder composed of gypsum and perlite that, when mixed with water, forms a highly thermally insulating firestop mortar. Designed to prevent the spread of fire and smoke through openings in fire-rated walls and floors, it is ideal for sealing around building service penetrations like cables, pipes, and ducts. Its hydraulic expansion ensures a tight seal, while maintaining acoustic performance in treated structures.
CharCoat FM creates a robust, thermally insulating barrier when applied to openings in fire-rated walls and floors. Upon mixing with water, the gypsum and perlite-based compound cures through hydraulic action, expanding approximately 1% to form a tight seal around penetrations. This prevents the passage of fire, smoke, and heat for up to 4 hours. The product is easy to apply, sands smoothly, and can be painted for aesthetic integration.
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Standard/Test
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Result
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Fire Resistance Ratings
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Up to 4 hours fire rating in concrete, brick, and gypsum substrates.
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Test Standards
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Derived performance after 1-month curing period.
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Parameter
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Value / Details
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Fire Resistance
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Up to 4 hours
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Application Method
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Trowel or pour after mixing with water
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Drying/Curing Time
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Fully set within 1 hour; full cure in 1 month
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Color / Finish
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Off-white, paintable
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Packaging
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Dry powder
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Certifications
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EN 13501-2
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CharCoat FM is non-toxic and low VOC for a safer work environment and easier regulatory compliance.
