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.
Industries
Infrastructure & Utilities
Industrial Plants
Commercial Buildings
Residential Buildings
Power
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.
Standard/Test
Result
Fire Resistance Ratings
Up to 4 hours fire rating in concrete, brick, and gypsum substrates.
Test Standards
Derived performance after 1-month curing period.
Up to 4-hour fire rating for robust fire and smoke protection.
Hydraulic expansion (~1%) ensures a tight seal around penetrations.
High mechanical resistance; load-bearing without reinforcement.
Easy to apply, sand, or drill with a smooth, paintable finish.
Suitable for cables, pipes, ducts, and multiple substrates (concrete, brick, steel, plastic).
Fully set within 1 hour for fast project completion.
Nearly unlimited storage time for inventory flexibility.
Maintains acoustic performance in walls and floors.
Cables, bundled cables, cable racks, and trays.
Steel, copper, alpex, and plastic pipes.
Air ventilation ducts.
Substrates including concrete, bricks, Leca, and steel (corrosion-protected metal required).
Parameter
Value/Details
Fire Resistance
Up to 4 hours
Application Method
Trowel or pour after mixing with water
Drying/Curing Time
Fully set within 1 hour; full cure in 1 month
Color / Finish
Off-white, paintable
Packaging
Dry powder
Certifications
EN 13501-2
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CharCoat FM is non-toxic and low VOC for a safer work environment and easier regulatory compliance.
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