Fire-Retardant PU Foam B1 - Advanced Sealant from China Suppliers | High-Performance Factory Solution for Construction
Exceptional Fire Retardancy (Class B1/B Certified)
This foam sealant is specially engineered with fire-retardant additives that meet stringent international standards (such as GB 8624 B1, EN 13501-1). In the event of fire, it exhibits excellent resistance to flame propagation and is designed to be self-extinguishing upon removal of the ignition source. It forms a protective char layer that helps delay the spread of flames and hot gases through openings, making it a critical component for passive fire protection in door and window perimeters, thereby enhancing overall building safety.
High Hardness and Dimensional Stability
Unlike standard insulating foams that remain soft, this product cures to a high-hardness, rigid structure with minimal long-term shrinkage. This provides outstanding mechanical strength and load-bearing capacity, ensuring that installed doors and windows remain securely fixed, resistant to sagging, and unaffected by wind pressure or operational stresses. The rigid seal also prevents compression over time, guaranteeing a permanent, gap-free fit.
Superior Soundproofing and Acoustic Insulation
The high-density, closed-cell structure of the cured foam acts as an effective sound-dampening barrier. It significantly reduces the transmission of airborne noise (such as traffic, urban sounds, and voices) through gaps around window and door frames. This contributes to a noticeably quieter, more peaceful, and comfortable indoor environment, meeting the growing demand for enhanced acoustic comfort in modern construction.
Excellent Adhesion and Airtight/Watertight Seal
It adheres tenaciously to a wide variety of common construction materials including concrete, brick, wood, PVC, and metals. By completely filling irregular cavities and gaps, it creates a continuous air and weather barrier. This superior seal blocks drafts, moisture infiltration, and dust, dramatically improving the building's thermal insulation (reducing heating/cooling costs) and protecting against water damage.
Frequently Asked Questions (FAQ)
What are the fire safety ratings of this foam sealant?
This foam sealant is Class B1/B certified, complying with strict international safety standards like GB 8624 B1 and EN 13501-1. It is self-extinguishing and forms a protective char layer to delay flame propagation.
Will this foam shrink or lose its shape after application?
No, the sealant is designed for high hardness and dimensional stability. It cures into a rigid structure with minimal long-term shrinkage, preventing sagging and ensuring a permanent, gap-free seal.
How effective is this foam sealant for soundproofing?
Thanks to its high-density, closed-cell structure, it acts as an acoustic barrier that significantly reduces airborne noises, such as traffic and urban sounds, through window and door frame gaps.
What materials can I apply this foam sealant to?
It exhibits outstanding adhesion to most common building materials, including concrete, brick, wood, PVC, and various metals.
Does the sealant protect against weather and drafts?
Yes, it creates a continuous airtight and watertight seal that blocks drafts, moisture, and dust, which enhances thermal insulation and helps lower heating and cooling costs.