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When fire safety standards demand rigorous attention to linear gaps and service penetrations, you need a sealant that performs under pressure. Everflex Fire-Fill provides the certified intumescent action needed to prevent fire and smoke transmission, giving you confidence in your project's compliance and integrity. Finish the job knowing your fire-rated joints and penetrations meet Australian standards, tested for up to 4 hours of resistance.
Everflex Fire-Fill is a waterborne, intumescent acrylic sealant designed to expand under fire exposure, forming an inorganic plug. This action prevents the transmission of fire through critical linear gaps and service penetrations in walls and floors. Tested to AS1530.4 and assessed to AS4072.1, it delivers up to 4-hour fire ratings for applications in plasterboard, concrete, blockwork, fibre cement, and other common building materials. This Australian-made formulation simplifies fire-stopping without the complexity of multi-component systems, making it a reliable single-pack solution for fire-rated environments. While Everflex Fire-Fill provides excellent fire resistance and contributes to good STC acoustic properties in appropriate systems, for projects demanding more stringent or specifically certified combined fire and acoustic performance, dedicated solutions may be required.
An up to 4-hour fire rating, tested to AS1530.4, is the core of Fire-Fill's performance. This means critical fire compartments in your structure maintain their integrity, preventing fire and smoke spread through penetrations and joints. Couple this with a movement capability of ±20%, and you have a sealant that accommodates structural shifts in joints up to 50mm wide while maintaining its fire-stopping properties. A low VOC content of 7 g/L meets Green Star environmental criteria, ensuring a safer application for trades and building occupants without compromising fire safety.
Everflex Fire-Fill is ready to use directly from the sausage, offering easy application and a smooth finish. It can be applied in temperatures ranging from 5°C to 35°C, providing flexibility across Australian seasons. Tooling is required immediately after application, typically within 10 minutes, to ensure a clean finish before skinning occurs. Cleanup is straightforward: while the product is still wet, use water for tools and spills. For cured product, mechanical removal is effective. Clean hands with Adheseal Hand Wipes.
For optimal adhesion, prepare surfaces to be clean, dry, and free from contaminants. While priming is often not required, for critical applications like multi-story buildings or high-stress joints, use Everflex Supaprime for porous substrates or Adheseal 50A Surface Prep for non-porous surfaces. Design joints with a 2:1 width-to-depth ratio, using an open-cell backer rod from the Adheseal backer rod range to control depth and prevent three-sided adhesion.
Everflex Fire-Fill serves as the final seal in fire-rated partition systems, ensuring the integrity of fire compartments. It is commonly applied after the primary construction of walls (e.g., plasterboard, concrete, aerated concrete) or floors, and after the installation of service penetrations (pipes, cables, ducts). Its role is to seal linear gaps between elements and annular gaps around services, completing the fire-rated assembly. This sealant is used as the direct fire-stopping component, often in conjunction with backer rods to achieve proper joint configuration and prevent three-sided adhesion.
Everflex Fire-Fill is not recommended for Colourbond panels. For natural stone, a stain testing program is always recommended before application to avoid discolouration or compatibility issues.
It provides up to a 4-hour fire rating, tested to AS1530.4 and assessed to AS4072.1. This rating applies to gaps up to 50mm, depending on the joint configuration and panel thickness.
Yes, Everflex Fire-Fill is paintable after 6-8 hours with acrylic, oil, and rubber-based paints. Always confirm adhesion with your chosen paint type, as non-flexible paints may crack due to the sealant's inherent movement capability.
No, Everflex Fire-Fill is not suitable for long-term water immersion or internal swimming pool applications. Avoid exposure to high levels of chlorine exceeding 5 ppm.
| Application | Key benefit | Primary trades |
|---|---|---|
| Fire-rated penetrations for cables, pipes, ducts through walls and floors | Forms an intumescent, inorganic plug to prevent fire and smoke transmission, tested to AS1530.4 and AS4072.1. | Fire protection installers, electricians, plumbers, commercial builders |
| Expansion joints in concrete, plasterboard, blockwork, and precast panels | Maintains fire integrity for up to 4 hours in joints up to 50mm, with ±20% movement capability. | Commercial builders, plasterers, concrete contractors |
| Acoustic sealing in wall and floor systems | Contributes to specified STC acoustic properties in appropriate systems, reducing sound transfer. | Plasterers, acoustic installers, commercial builders |
| Internal and external fire-rated sealing where weather exposure is a factor | Offers excellent UV and weather resistance, maintaining a flexible, waterproof joint. | Commercial builders, façade installers, fire protection contractors |
| Gap sealing around building services in fire-rated environments | Easy to apply and tool, ensuring efficient and compliant installation for critical fire zones. | Electricians, plumbers, HVAC technicians |
Ensure substrates are sound, dry, and free of dust, grease, or contaminants. For deep joints, install open-cell backer rod 25% larger than joint width.
Cut nozzle at 45° angle and gun sealant ahead of nozzle, ensuring full contact with both sides of joint. Tool off within 10 minutes for smooth finish.
Wear gloves and safety glasses. Nitrile Rubber gloves are suitable for intermittent contact. Always wash hands before eating, drinking, or using the toilet.
Ensure adequate ventilation to maintain air concentrations below exposure standards. Use in well-ventilated areas or with local exhaust ventilation. Avoid generating and inhaling dusts.
Store in a cool, dry area. Keep away from food, drink, and animal feeding stuffs. Dispose of product as prescribed waste in accordance with state and local regulations.
Proper surface preparation is crucial for reliable long-term performance and adhesion for fire-rated installations.
Surface prep: Ensure surfaces are structurally sound, dry, clean, and free from dust, loose material, oils, and other contaminants. Concrete must cure for at least 28 days. Avoid application if surface water or continuous dampness is present.
Primer: Optional, but recommended for optimal adhesion in high-performance or exposed applications. Use Adheseal 2001 or Everflex Supaprime primer applied by brush. Allow 30 minutes to 2 hours cure time before sealant application.
Surface prep: Ensure surfaces are stable, dry, clean, and free of dust or loose material. Mask joint edges for a neat finish.
Primer: Not normally required. Adhesion testing is always advised.
Surface prep: Slightly roughen the surface with a fine abrasive pad. Clean and pre-treat using Adheseal 50A surface prep with a clean cloth. Use the two-wipe process to ensure cleanliness.
Primer: Optional. Use Adheseal 50A surface prep. Allow 30 minutes to 2 hours before sealant application. For copper, brass, titanium-zinc, and other plastics, an adhesion test is advised.
Surface prep: Ensure surfaces are sound, dry, clean, and free from loose paint, dust, oils, or other contaminants. Perform compatibility tests for painted surfaces.
Primer: Not normally required. Test adhesion and compatibility, especially for painted surfaces.
| Property | Value |
|---|---|
| Type of Product | Acrylic paste |
| Curing System | Evaporation of water |
| Density | 1.53 g/cm3 |
| Application Temperature | 5°C to 35°C |
| Service Temperature | -10°C to 80°C |
| VOC Content | 7 g/L |
| Shelf Life | 12 months in original packaging |
| Working Time | 15 min |
| Max Joint Dimensions | 50 x 25mm |
| Movement Capability | ±20% |
| Fire Rating | Up to 4 hours (AS1530.4, AS4072.1) |
| Paintable After | 6-8 hours |
| Skin Time | 30-45 minutes |
| Cure Rate | 2mm per 24 hours (25°C, 50% humidity) |
| Full Cure | 7 days (20mm wide, 10mm deep joint at 20°C, 70% humidity) |
| Clean Up | Water (wet), Mechanical (cured) |
| Packaging | 600ml Sausage |
| Colour | Grey |
Here are some common examples on where Everflex Fire-Fill Acrylic Sealant used by our customers.
