Certifications

Certifications Explained

7: Global UL certifications
FM: Approved systems
20947: Warnock Hersey Intertek listing
9: GCC civil defence listings

The certifications that determine approval

A firestop certification never certifies a tube of sealant on its own. It certifies a tested system - construction, service, gap and material together.

01 · Most important

UL Listings

R20868 · R25278 · R40136 · R39077 · R38459 · R22290 · R22003

What is tested

UL (Underwriters Laboratories) tests a complete firestop system - the wall or floor construction, the service passing through it, the annular gap and the sealing material - in a furnace to a defined time/temperature curve, then hits it with a hose stream.

Why it matters

A UL listing is not a product certificate. It certifies a tested assembly, identified by a system number. That is why a submittal must name the system, not just the sealant. Each R-number above is a file covering a family of listed systems, and every system carries drawings that define permitted substrates, gaps, thicknesses and ratings.

On site this is what makes an installation defensible: the installed detail either matches a listed system or it does not.

02 · Insurer-recognised

FM Approvals

FM Approved

What is tested

FM Approvals is the certification arm of an industrial property insurer. Its testing looks at loss prevention as well as life safety, including durability and installation repeatability.

Why it matters

For power generation, substations and industrial plant, FM Approval is often the line an insurer or owner's engineer draws. It signals the system holds up as an asset-protection measure, not only as a code compliance item.

Frequently requested alongside UL on utility and industrial specifications.

03 · Third-party listing

Warnock Hersey / Intertek

Listing 20947

What is tested

Intertek's Warnock Hersey mark is an independent listing and follow-up service programme: initial fire testing plus recurring unannounced factory audits.

Why it matters

It provides a second accredited body confirming that what leaves the factory still matches what was tested. Consultants use it as corroborating evidence where a project requires more than a single certification body.

Useful where a specification calls for listings from two independent laboratories.

04 · Legally required

Civil defence listings

Dubai · Abu Dhabi · Sharjah · Ajman & RAK · Saudi Arabia · Kuwait · Qatar · Oman

What is tested

Each GCC authority maintains its own register of approved firestop products and suppliers. Approval is jurisdiction-specific and time-limited.

Why it matters

International test data alone does not clear an inspection. Without a current local listing, a compliant system can still be rejected at handover.

We supply the current approval certificate for the emirate or country of the project with every submittal.

Reading a listing

F, T, L and W - what the letters mean

A UL 1479 listing is quoted as a rating set, for example 2 hr F, 1 hr T. Specifying the wrong letter is the most common reason a certified product still fails inspection.

F rating: Time in hours the seal stops flame passage and withstands the hose stream. The baseline number a specification quotes.
T rating: Adds a 181°F (100°C) limit on temperature rise on the unexposed side. Required where combustibles sit close to the penetration.
L rating: Measured air leakage through the seal, in CFM. Matters for smoke control and pressurised stair or plant enclosures.
W rating: Certifies the seal is also a water barrier, for floor penetrations at risk of standing water.

Standards

The test standards behind the listings

Each certification cites the standard the system was tested to. These are the standards regional authorities and international consultants specify.

UL 1479 / ASTM E814: Penetration firestop systems - the F, T, L and W ratings above.
UL 2079: Joint systems tested through cyclic movement before the fire exposure.
UL 263 / ASTM E119: Fire resistance of the wall, floor or structural steel assembly itself.
ASTM E84: Surface burning - flame spread and smoke development of coatings.
IEEE 1202 / FT4: Flame propagation along cable installations and cable coatings.
EN 1366-3 / EN 13501-2: European penetration seal testing and EI classification.

Due diligence

How to verify a firestop certification

Five checks that separate a compliant installation from a certified product installed the wrong way.

01Ask for the system number, not the product name - a certificate without a system number proves nothing.
02Check the listing covers your substrate: concrete, blockwork, drywall and deck each test separately.
03Confirm the rating period matches the compartment rating on the fire strategy drawing, not the highest number available.
04Confirm the civil defence approval is current for the project's jurisdiction on the date of handover.
05Keep the as-built record: photographs, system number and installer, per penetration.

Certification bundle

Request the current documents

We issue the UL listings, FM approval, Intertek listing and the civil defence approval for your jurisdiction as a revision-controlled pack, matched to the systems selected for your penetration schedule.

Request certificates Technical resources

Certification data published here is taken from MVL Firestop Systems, Dubai - the manufacturer we distribute for. Premier Firestop is an approved distributor, not the test certificate holder.

Send us your penetration schedule

Share drawings, joint details or a fire strategy and we return the matching MVL certified systems with full submittal documentation.

Let's talk…Technical resources