difference between intumescent and spray foam

Thank you for posting your query.

Intumescent product expands multiple times due to heat and seals the cavity caused by the burning of the combustible penetrant whereas Spray foams seals the cavity completely and have movement accommodation properties. Most common application of spray foams are expansion or stretched connection joints in fire compartment walls and floors.

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Generally In tumescent system used in fire protection for combustible penetrants and foam used for gap filling the joints between door and wall