Every time a cable, pipe or duct passes through a fire-rated wall or floor, it makes a hole in something that was designed to hold fire back for a defined period. Sealing that hole correctly is what keeps the compartment rating intact. Getting it wrong is one of the more common reasons a project stalls at inspection, and the root cause is almost always the same misunderstanding.
The distinction that catches people out
The UAE Fire & Life Safety Code of Practice requires that firestop arrangements be tested and certified by a recognised third-party testing and certification body, and registered with the Civil Defence Authority.
Critically, what gets certified is the system — not the tube of sealant. A firestop system is the whole assembly: the specific wall or floor construction, its thickness, the type and diameter of the penetrating service, the annular gap, the backing material, the depth of sealant and the product itself. Change any one of those variables and you are outside the tested configuration.
This is why a datasheet saying "fire-rated to 4 hours" does not, by itself, demonstrate compliance. That rating was achieved in a particular tested assembly. If your penetration is a 110mm uPVC pipe through a 150mm blockwork wall, you need a tested system covering that combination — not a general product claim.
The standards behind the certification
Different penetration types are tested against different standards:
| System type | Test standards |
|---|---|
| Through-penetration and membrane-penetration | ASTM E814, UL 1479, EN 1366-3, FM 4990 |
| Fire-resistive joint systems | ASTM E1966, UL 2079, EN 1366-4, FM 4990 |
| Perimeter fire barrier systems | ASTM E2307, EN 1364-3, EN 1364-4 |
You do not need to read these standards. You do need to make sure the certificate your supplier provides references the right one for the penetration in front of you, and that it comes from a recognised third-party body rather than the manufacturer's own laboratory.
The product types, and when each applies
Intumescent acrylic sealant
Intumescent means the material expands when heated — typically many times its original volume. That expansion is what closes the gap left behind when a combustible service melts or burns away. This makes intumescent products the right choice around plastic pipes, cable bundles and anything that will not survive the fire, because the seal has to form after the service has gone.
Fire-rated acrylic sealant
Non-intumescent fire-rated acrylic suits static or low-movement joints and penetrations by non-combustible services. It is paintable, which matters in finished areas, and it handles construction joints and head-of-wall details where movement is minimal.
Fire-rated silicone sealant
Neutral-cure fire-rated silicone handles movement. Where a joint will expand and contract — building movement joints, curtain wall perimeters, joints between dissimilar materials — an acrylic will eventually crack and an intumescent will not accommodate the cycling. Low-modulus fire-rated silicone is the correct product, typically rated up to four hours in the right assembly.
Where it goes wrong on site
General-purpose sealant used on a rated penetration. The most common and most serious error. A standard silicone or acrylic will not hold a fire rating, and visually the finished bead looks identical to a compliant one. This is precisely why inspectors ask for documentation rather than judging by eye.
The wrong depth or no backing. Tested systems specify sealant depth and usually a backing material such as mineral wool or a backer rod. Applying a shallow surface bead over an unfilled void is outside the tested system, regardless of which product was used.
Retrofitted services through a completed seal. A new cable pulled through an existing firestop seal voids it. The penetration has to be made good to the tested system again — and this is the one most frequently missed during fit-out and later alterations, because the work is small and nobody treats it as a fire event.
No record of what was installed where. Even a correctly installed seal is difficult to sign off if nobody recorded which system was used at which penetration. Photograph penetrations before and after sealing, and keep the certificate references against locations. Doing it during the work takes minutes; reconstructing it afterwards is painful.
What to ask a supplier for
When you enquire about fire-rated sealant, describe the penetration rather than naming a product. Specifically:
- The rated element — blockwork, concrete slab, drywall — and its thickness and rating
- What is passing through it, its material and its diameter
- The annular gap
- Whether the joint will move
- The fire rating required, in hours
A supplier who quotes a cartridge without asking any of that is selling you a product, not a compliant system. Ask for the third-party certificate and the tested system detail that matches your configuration, and check that it is registered with Civil Defence before the material comes to site.
A note on honesty here
We supply fire-rated and intumescent sealants, and we would rather tell you this clearly than sell you a tube that fails inspection: the product is one component of a certified system, and installation to the tested detail is what makes it compliant. If your specification calls for a system we cannot source with matching documentation, we will say so.
The product range is on our firestop sealant page, and the wider range sits under construction sealants, and where the penetration passes through a structural movement joint you will also need expansion joint systems rated for the same fire performance.