Nullifire FP333 Trunking Infill

Nullifire FP333 Trunking Infill


FP333 Trunking Infill

FP333 Trunking Infill is a fire resistant compressible foam strip layered with high expansion intumescent material produced in three sizes. In a fire, the intumescent expands and hardens providing a fire and cold smoke barrier.


FP333 is designed to provide a permanent fire barrier within trunking boxes passing through fire compartment walls. They are of particular use where there are regular changes in cabling requiring frequent removal and replacement, for example in computer or communication installations.

Always read SDS, pre-application guidance and relevant application detail prior to application. Ensure the latest documents are downloaded prior to every project commencement.

Safety data sheet must be read and understood before use.
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    • Up to 2 hours fire resistance - Tested to EN 1366-3.

    • Integrity, insulation and smoke seal.

    • Zero fibre migration.

    • Three standard sizes to allow for complicated service conditions.

    • Full dry system.