Firestop Engineering
FM 4991 Certified Contractor — One of Very Few in Asia
Fire compartmentation is the core mechanism of passive fire protection — TKC takes responsibility for the safety of every firestop node with FM 4991 certification
What FM 4991 Certification Means
FM 4991 is a certification of firestop-contractor capability. It does not make a firestop service or material a blanket FM product-certification claim; materials and systems still require confirmation against project specifications, applicable tested systems, and product documentation.
Asia Market Reality
FM 4991 and FM 4440 cover different capability areas: the former concerns a firestop contractor, while the latter relates to venting systems and relevant certified products. TKC presents them separately to avoid conflating firestop engineering with explosion-protection products.
Material & System Selection
Materials and systems selected against project specifications, applicable tested systems, penetration conditions, and product documentation
Method Application
Installation follows the applicable system instructions and project technical requirements, with construction records retained
Construction Management
FM 4991 certified construction management system, full control from material arrival to completion
Archive Management
Traceable tags + construction archive, every node traceable and verifiable
Audit Documentation Basis
Contractor capability, node tags, installation photographs, and third-party reports can support technical review by owners or insurers
Rare in Asia
One of very few FM 4991 certified firestop contractors in Asia
Four Core Services
FM 4991 Certified Firestop Engineering
TKC delivers construction management through its FM 4991 firestop-contractor capability. Materials and firestop systems are selected against project specifications, applicable tested systems, and technical documentation.
Fire Compartmentation Integrity Testing
Using ILAC MRA accredited laboratory equipment to conduct airtightness testing on building enclosures, quantitatively assessing fire compartmentation integrity and issuing third-party recognized reports.
Test-Diagnose-Repair-Verify Closed Loop
One organization, from problem discovery to result delivery. TKC leads the entire process: on-site testing → defect diagnosis → firestop repair → re-verification, delivering directly verifiable results.
Traceable Tag Archive System
Every firestop node is equipped with a traceable tag, establishing a complete construction archive supporting FM insurance audits, project completion acceptance, and subsequent maintenance management.
"Test—Diagnose—Repair—Verify" One-Stop Closed Loop
One organization, from problem discovery to result delivery. Clients only need one call.
On-site airtightness testing, quantitative assessment of fire compartmentation integrity
Defect location and analysis, identifying firestop failure nodes and causes
Firestop repair implemented against the project’s applicable system, installation instructions, and site conditions
Re-verification testing, issuing ILAC MRA recognized third-party report
Firestop Node Type Coverage
FM 4991 Certificate of Compliance
FM Approvals
Class 4991
Firestop Contractor Certification
Certified Company
Shanghai Tengxi Construction Eng Co Ltd
Approval Identification
PR449887, RR245394
Approval Granted
10 April 2025
Verify At
www.approvalguide.comFM 4991 is a firestop-contractor capability certification issued by FM Approvals. This website presents FM 4440 venting-system capability and FM 4991 firestop-engineering capability separately, and each should be verified against its respective scope.
Material & System Selection Basis
Actual materials and firestop systems are confirmed against project specifications, applicable tested systems, product data, and installation instructions.
JH607 + JH608
Elastomeric Firestop Sealant + Firestop Coated Board · FM Approved Design No. 790 · For cable penetrations through concrete walls and floor slabs
FM Certified System Parameters
| FM Standard | FM Approval Standard 4990 |
| FM System No. | Design No. 790 |
| System Type | Wall & Floor Slab Cable Penetration Firestop System |
| Substrate | Concrete wall or concrete floor slab |
| Min. Substrate Thickness | 200 mm (7.8 in.) |
| Penetrating Items | Cables or cable trays |
| Listing Country | China |
| Approval Type | FM Approved |
Ratings per ASTM E814 + E2226 tests. Opening dimensions, number of penetrants, cable fill ratio, board layers, joint width, and sealant thickness must strictly follow FM Approved Design No. 790 installation drawings.
Installation Key Steps (7-Step Method)
System Material Specifications
| CN Certified Model | DCK-Z-FDL-EIC3-JH608 |
| Dimensions | 1200 × 600 × 50 mm |
| Core Material | Mineral Wool Board |
| Mineral Wool Density | 180 kg/m³ |
| Surface Material | Decorative Firestop Coating |
| Coating Fineness | < 90 μm |
| CN Fire Cert. No. | Z2024081809001520 |
| Type Test Report | Gn202403055 |
| Certificate Validity | 2024-12-16 to 2029-12-15 |
Key Features
| CN Certified Model | DJK-Z-FDL-EIC3-JH607 |
| Package | 300 mL / cartridge |
| System Role | Sealant for Design No. 790 system |
| Primary Use | Board joints, perimeter gaps, penetrant sealing |
| Elongation | > 20% |
| CN Fire Cert. No. | Z2024081809001527 |
| Type Test Report | Gn202403059 |
| Certificate Validity | 2024-12-16 to 2029-12-15 |
Key Features
GB 23864-2023 National Standard Test Data
Testing Authority: Tianjin Fire Research Institute, MEM · National Quality Inspection Center for Fixed Fire Extinguishing Systems and Fire-Resistant Components (CMA · CNAS L0988 · ilac-MRA)
| Test Item | Result | Pass |
|---|---|---|
| Flexural Strength | 0.30 MPa (req. ≥0.10) | ✓ |
| Water Resistance | 3 d, no swelling or cracking | ✓ |
| Moist Heat Resistance | 120 h, no cracking or powdering | ✓ |
| Freeze-Thaw Cycles | 15 cycles, no cracking or powdering | ✓ |
| Combustion Performance | Class B₂ (E) | ✓ |
| Smoke Toxicity | Class ZA₂ | ✓ |
| Air Permeability | 0.1 m³/(m²·h) (limit ≤3.5) | ✓ |
| Fire Integrity | 180 min — integrity maintained | ✓ |
| Fire Insulation | 180 min, max temp rise 157.8°C | ✓ |
| Hose Stream | No water flow holes formed | ✓ |
| Test Item | Result | Pass |
|---|---|---|
| Apparent Density | 1.5×10³ kg/m³ (limit ≤2.0×10³) | ✓ |
| Corrosion | 7 d, no rust or corrosion | ✓ |
| Water Resistance | 3 d, no swelling or cracking | ✓ |
| Acid / Alkali Resistance | 3 d, no swelling or cracking | ✓ |
| Moist Heat Resistance | 360 h, no cracking or powdering | ✓ |
| Freeze-Thaw Cycles | 15 cycles, no cracking or powdering | ✓ |
| Combustion Performance | Class B₂ (E) | ✓ |
| Smoke Toxicity | Class ZA₂ | ✓ |
| Air Permeability | 0.7 m³/(m²·h) (limit ≤3.5) | ✓ |
| Fire Integrity | 180 min — integrity maintained | ✓ |
| Fire Insulation | 180 min, max temp rise 102.7°C | ✓ |
| Hose Stream | No water flow holes formed | ✓ |
Fire Performance Margin Comparison (180 min Test)
Both products achieved 180 min fire integrity and insulation. No water flow holes after hose stream test. JH607 has larger temperature margin, suitable for locations with higher insulation requirements.
Certification & Traceability
| Item | JH607 | JH608 |
|---|---|---|
| FM System Design | Design No. 790 | Design No. 790 |
| FM Standard | FM Approval Standard 4990 | FM Approval Standard 4990 |
| FM Certificate No. | PR461358 | PR461358 |
| CN Certified Product Name | Firestop Sealant | Firestop Board |
| CN Certified Model | DJK-Z-FDL-EIC3-JH607 | DCK-Z-FDL-EIC3-JH608 |
| CN Fire Cert. No. | Z2024081809001527 | Z2024081809001520 |
| Type Test Report No. | Gn202403059 | Gn202403055 |
| CN Standard | GB 23864-2023 | GB 23864-2023 |
| Certificate Validity | 2024-12-16 to 2029-12-15 | 2024-12-16 to 2029-12-15 |
| Supply / System Contractor | Shanghai Tengxi Construction Eng Co Ltd (TKC) | Shanghai Tengxi Construction Eng Co Ltd (TKC) |
Design No. 790 System Applications
Cable Through Concrete Fire Walls
Single cables or cable bundles penetrating concrete wall openings
Cable Tray Through Fire Barriers
Cable tray penetrations through concrete fire separation members
Switchrooms / Substations
Cable penetration sealing in switchrooms and substations
Data Center Electrical Rooms
Penetration sealing in data center electrical rooms
Industrial Facilities
Cable mezzanines and cable shaft penetrations
Applicable conditions: All locations must comply with FM Approved Design No. 790 installation drawing requirements: concrete substrate, minimum thickness 200 mm, penetrating items are cables or cable trays.
Start with a Free Safety Assessment
Speak with TKC's certified engineers for a systematic evaluation of your explosion protection and firestop systems against FM Global standards. We serve clients across China and Asia.