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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.
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.
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.
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.
This foam sealant meets stringent international fire safety standards including GB 8624 B1 (Chinese standard) and EN 13501-1 Class B (European standard). It is certified as a Class B1/B fire-retardant material, meaning it demonstrates excellent resistance to flame propagation and is self-extinguishing when the ignition source is removed.
Unlike standard polyurethane foam, this product incorporates specialized fire-retardant additives and cures to a high-hardness, rigid structure. Standard foams remain soft and flexible after curing and offer no meaningful fire resistance. This product provides superior mechanical strength, dimensional stability, and passive fire protection — making it specifically suitable for safety-critical applications around doors and windows.
This foam sealant bonds tenaciously to a wide range of common construction materials, including concrete, brick, mortar, wood, PVC, aluminum, steel, and other metals. Its strong multi-substrate adhesion makes it ideal for sealing the perimeter gaps of window and door frames in both new construction and renovation projects.
Yes. By creating a continuous, airtight and watertight seal around window and door frames, this foam sealant effectively eliminates drafts and prevents moisture infiltration. This significantly improves the building envelope's thermal insulation performance, reducing unwanted heat loss in winter and heat gain in summer — leading to lower heating and cooling energy costs over time.
Absolutely. Its Class B1/B fire-retardant certification, high mechanical strength, and dimensional stability make it well-suited for high-rise residential, commercial, and public buildings where passive fire protection and structural integrity are mandatory requirements. It complies with the fire safety regulations typically enforced in such construction projects.
The cured foam features a high-density, closed-cell cellular structure that acts as an effective acoustic barrier. When applied to fill the gaps around door and window frames — which are common weak points for sound transmission — it significantly reduces the passage of airborne noise such as traffic, voices, and urban ambient sounds, contributing to a quieter and more comfortable indoor environment.
