Firestop acrylic sealant
Intumescent Firestop Acrylic Sealant | 3-hour fire resistance for cable and pipe penetrations
NEW AY Intumescent Firestop Acrylic Sealant is a water-based, halogen-free, asbestos-free firestopping sealant designed for use in fire-rated wall and floor assemblies. When exposed to fire, the material intumesces and expands to form a dense, insulating char that effectively restricts the passage of flames, heat, and smoke.
The sealant delivers fire resistance ratings of up to 3 hours, while maintaining excellent air-tightness and water-tightness under normal service conditions. Its formulation ensures long-term durability, with a designed service life of up to 30 years, making it suitable for critical infrastructure and industrial environments.
Popular application
Cable and cable tray penetrations
Metal pipe passing through
Key Features
• Fire resistance up to 3 hours
Intumescent expansion under fire exposure to maintain fire-rated integrity of walls and floors
• High expansion performance (>1000%)
Effectively seals irregular and multi-service penetrations
• Environmentally responsible formulation
Water-based, halogen-free, asbestos-free, VOC-free; low smoke and low toxicity
• Durability in demanding environments
Resistant to moisture, chemicals, corrosion, humidity, thermal aging, and freeze–thaw cycles
• Installer-friendly
Easy application, water clean-up prior to curing, supports retrofitting and future cable additions
• Multi-substrate adhesion
Bonds effectively to concrete, masonry, gypsum, metal, wood, and similar construction materials
Fire resistant : 3hours
Anti-Water
Anti-gas & smoke
Electric insulation
Anti-corrosion
Applications
• Electrical substations and switchgear rooms
Firestopping of high-density cable penetrations
• Power plants (thermal, hydro, nuclear, renewable)
Cable trays, cable tunnels, control rooms, and equipment penetrations
• Wind and solar energy installations
Fire sealing of control cabinets, inverter rooms, and cable entry points
• Battery Energy Storage Systems (BESS)
Fire and smoke sealing for battery enclosures, cable routes, and service penetrations
• Oil, gas, and energy-related process facilities
Firestopping of cable, pipe, and HVAC penetrations exposed to corrosive environments
Scenarios
Data Sheet
Type
Water-based acrylic
Color
Grey
Fire resistant time
3 hours
Reaction to fire
HB-class
Expansion Ratio
>1000%
Shelf Life
12 Month
Water resistance
Yes
Acid resistance
Yes
Alkali resistance
Yes
Oil resistance
Yes
Damp heat resistance
Yes
Corrosion resistance
Yes
FAQ
How to understand the HB flammability rating and the 3-hour fire resistance duration?
This fireproof sealant itself (HB grade) can be ignited and burned, but it is precisely the chemical reaction (intumescent charring) during its combustion that creates a “firewall” capable of holding up for 3 hours without failure, thereby achieving the “3-hour fire resistance” system performance.
How does this sealant provide fire protection?
The sealant expands more than 1000% when exposed to fire, forming a dense char barrier that prevents flames, smoke, and gases from spreading for up to 3 hours.
Is the product suitable for indoor and semi-exposed applications?
Yes. Its resistance to moisture, humidity, and temperature cycling makes it suitable for indoor and protected industrial environments.
Does the installation require special tools?
The sealant can be applied using a standard caulking gun.
Can this firestop sealant be used alongside other fire protection products in a project?
Yes. For larger wall or floor penetrations, the core can be filled with firestop foam and the exterior surface sealed with the sealant. Alternatively, firestop blocks can be used to fill large openings, with the sealant applied to seal remaining gaps.
How does this product differ from standard acrylic sealants on the market?
Many acrylic sealants available for general construction are not intumescent and do not expand under fire exposure, resulting in lower fire-resistance performance compared to NEW AY Firestop Acrylic Sealant.
How to choose between firestop foam and firestop sealant?
It depends on the application:
• firestop sealant is best for small gaps, cable trays, and pipe penetrations where a rigid, paintable finish is required.
• Intumescent firestop foam is ideal for larger, irregular openings, complex penetrations, or environments where flexibility and easy re-entry are important.