Understanding Intumescent Fire Stop Material

Intumescent material expands when heated to prevent the spreading of fire. All INTUMET™intumescent products are asbestos-free and meet NFPA 105 and British test standards. INTUMET™ products are rubber-like in texture and are easy to cut and glue, where other products tend to be brittle and more difficult to handle. We offer our product in a variety of convenient standard sizes and volumes.

Each product is engineered using different formulas and material since optimum performance is specific for each product, and each product needs to meet specific conditions.

There are four different INTUMET™intumescent materials (FS1001, FS2002, FS3003 and FS4004) and each are designed to give you the performance you need. The primary characteristics that distinguish different intumescent materials are Activation Temperature, Expansion (volume and force), Char (hard, soft or fluffy) and Capacity for Continued Expansion.








                                               

FS1001 INTUMET™: Is designed for blocking the effects of heat where little or no expansion is needed or desirable. For example, where undercutting for fitting automatic door bottoms subjects wood doors to accelerated heat transfer, lining the vulnerable U-channel restores the integrity of the door's fire resistance.

FS2002 INTUMET™: Is well-suited for applications where explosive expansion would jeopardize the integrity of the fire and smoke seal, yet require a firm char for resistance to external pressure. This material is ideal for glazing tape.

FS3003 or SOFT PUFF™ INTUMET™: Was developed specifically for doors. This material is used in all general Intumescent Door Gasketing and Door Bottoms, unless otherwise specified. This rubber matrix material begins intumescing at relatively low temperatures where organic materials begin to emit combustible and noxious gases. It expands gradually to fill all gaps with moderate force that will not unlatch the door, and has sufficient reservoir capacity to continue intumescing if escape door is closed again. It also stands up well to the stringent requirements for protecting fire doors on oil rigs, which are subject to especially intense heat and flames.

FS4004 INTUMET™: Is a graphite-based material formulated to expand to approximately 80 times its original volume. This expansion rate works very well for filling lock-side top corner gaps typical of metal doors exposed to extreme heat. Because FS4004 expands with strong force, it is also the best intumescent material to use for protecting fire-wall through-penetrations, such as PVC pipe. Its forceful expansion chokes the pipe and completely blocks the passage of smoke and fire.

Superior expansion value makes FS4004 the right intumescent material as well for installation in electrical boxes. In the event of a spark-generated fire inside the box, intumescent lining the interior expands instantly and at high volume, filling the box with flaky char, choking the fire, and sealing all holes and wire connections from spreading flames.FS4004 is the product to use for protecting fire-rated safes. It is also used to laminate the slats of louvers in fire walls where it will expand with sufficient force and volume to seal the air passages from spread of flames.

Intumescent material is available in many standard widths, lengths, thicknesses, colors and varieties. Have something specific in mind? Give us a call at 845-388-1300. Our trained staff will assist you in purchasing the product that is suited for you.