Spray Foam Ventilation Sealant
Vent Seal
A rapid, fire-retarded sealing solution for underground emergencies
Vent Seal is a versatile, fire-retarded, two-component spray foam engineered to create airtight barriers and ventilation seals, especially in the event of underground fires. Its portability enables rapid deployment, which, combined with its excellent sealing properties, makes it an indispensable solution for emergency ventilation control and underground fire containment
Supplied in a portable, self-contained pack
- Two lightweight, nitrogen-pressurised cylinders containing Isocyanate (Component A) and Polyol (Component B)
- Dispensing gun and hose assembly for controlled application
- Spare nozzles for multi-use flexibility
- Safety kit to support safe handling
- QR-coded access to a training video for quick instruction
Technical Data
| Pack weight: | ≈ 18 kg |
| Foam density: | ≈ 40 kg/m3 |
| Foam yield: | 0,275 – 0,300 m3/pack |
| A rigid foam with a closed-cell structure when cured | |
| Expands and sets within seconds; fully cured within 30 minutes | |
| Adheres strongly to most surfaces | |
| The surface chars when exposed to fire, but does not lose its rigidity | |
Creating an Air-tight Seal
Vent Seal forms a durable, airtight barrier when applied over a custom-built support structure.
This structure typically consists of light-duty props (Vent Props) and a backing assembly made of riblath with a membrane backing (Dura Seal).
To install:
- Place support props at required intervals to ensure structural integrity.
- String wire between the props to anchor the riblath.
- Tie the ribbed lath securely to the front of the wire and props.
- Orient the riblath so its ribbed surface faces the high-pressure side; this is the surface that will be sprayed with Vent Seal to create the airtight seal.
This configuration ensures a robust sealing arrangement in demanding environments, with minimal setup effort.
OTHER APPLICATIONS OF VENT SEAL UNDERGROUND
Beyond emergency fire containment, Vent Seal is also used in a variety of underground sealing scenarios where airtight integrity is critical. These include:
- Sealing around ventilation ducting to prevent air leakage and to provide a vibration-absorbent matrix between the ducting and the surrounding rock formation
- Filling crevasses and voids in tunnel walls, especially in fractured or uneven rock formations
- Creating seals around the edges of other ventilation barriers, enhancing their performance and containment reliability
- Forming airtight closures over backfilled tunnel sections, supporting ventilation control, and structural integrity
These applications make Vent Seal a versatile solution not only for fire emergencies, but also for routine ventilation management and structural sealing.
Dura-Seal
Lightweight, galvanized ribbed lath with a membrane backing. The common name for ribbed lath is ‘riblath’.
| Product Designation | Dura Seal |
| Riblath material: | 0.5 mm galvanized steel |
| Riblath sheet size; mm: | 600 x 2500 |
| Mass per sheet; kg : | 2.48 |
| Backing membrane: | 600 x 2500 |
| Riblath sheet size; mm: | Flame-resistant ventilation brattice |
| Membrane attachment: | Staples |
| Total mass, kg : | 3.0 |
Vent-Prop
Light-duty, telescopic, mild-steel prop with adjustable base jack.
| Vent Prop Designation | 1.2 m | 2.0 m |
| Min. usable height; mm | 1300 | 2100 |
| Max. usable height; mm | 2650 | 3650 |
| Mass; kg | 10.5 | 13.0 |
| Base tube: Length x diameter x wall; mm | 1000 x 57 x 2.0 | 1200 x 57 x 2.0 |
| Telescopic tube; Length x diameter x wall; mm | 1200 x 50.8 x 2.00 | 2000 x 50.8 x 2.0 |
| Base jack | Standard scaffolding jack | |
| Base plate, mm | 150 x 150 x 5 mm | |
| Paint | Golden Yellow | |
Fire-hose Manifold
| Product Designation | Manifold |
| Inlet diameter; mm | 100 NB |
| Outlet diameter; mm | 4 x 50 NB |
| Mass; kg | 23.5 |
| Overall length; mm | 720 |
| Overall height; mm | 355 |
| Pressure gauge range; bar | 0 – 25 bar |
| Pressure rating; bar | 16 |