PU Foam
Fire-retardant Modified PU FOAM B2
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Our B2 Fire-Retardant Polyurethane Foam Sealant represents a significant advancement in building insulation and protection technology. Engineered to comply with stringent European fire classification standards (EN 13501-1), this "B2" rated foam offers a critical balance of superior performance and essential fire safety for a wide range of construction and renovation projects. Unlike standard insulating foams that may contribute to fire spread, this specialized formulation is designed to resist ignition from small-scale fire sources, providing valuable time for occupant safety and emergency response. It is the go-to solution for professionals seeking a versatile, reliable, and safety-conscious material for sealing, insulating, and installing doors, windows, and building components.
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Certified B2 Fire-Retardant Performance: This is the product's defining feature. The B2 classification signifies a material that is "normally flammable" but possesses effective resistance to ignition. In practical terms, the foam incorporates advanced flame-retardant additives. When exposed to a small flame, it is designed to not readily ignite, and if it does catch fire, it exhibits a significantly reduced rate of flame spread and will self-extinguish once the flame source is removed. This property is crucial for limiting the initial development of a fire, making it an essential component for improving overall building fire safety, particularly in residential and general commercial applications where higher-grade materials may not be mandated.
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High Hardness and Structural Filling Capacity: Upon full curing, the foam transforms into a rigid, high-strength polymer with excellent dimensional stability. This high hardness is not merely for durability; it provides crucial load-bearing and structural support for installed elements like window and door frames. It prevents frames from shifting, warping, or becoming misaligned due to wind load, frequent use, or building settlement. The rigid, expansive fill ensures a completely gap-free installation, eliminating weak points in the building envelope.
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Superior Acoustic and Thermal Insulation: The cured foam's closed-cell structure creates a formidable barrier against energy transfer. It effectively dampens sound waves, significantly reducing the transmission of airborne noise (traffic, voices, environmental sounds) through gaps around apertures, thereby enhancing indoor acoustic comfort. Simultaneously, these sealed cells trap air, forming an excellent thermal break that minimizes heat loss in winter and heat gain in summer. This dual insulating action contributes directly to lower energy consumption and improved living comfort.
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Exceptional Adhesion and Airtight/Weatherproof Seal: The foam adheres powerfully to most common construction substrates—including concrete, brick, masonry, wood, PVC, and metals—without the need for primers in most cases. Its expansive nature allows it to fill complex, deep, and irregular cavities thoroughly, creating a continuous, monolithic seal. This results in a perfectly airtight and weatherproof barrier that blocks drafts, rainwater ingress, dust, and pests, protecting the building structure from moisture damage and ensuring consistent indoor climate control.
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This single-component foam is remarkably user-friendly. It is dispensed using a standard applicator gun, allowing for precise, controlled, and clean application. The foam exhibits controlled expansion, minimizing the risk of over-expansion that can distort frames. It becomes tack-free within 20-30 minutes and achieves full cure and ultimate properties within 24 hours, depending on temperature and humidity conditions. Once cured, it can be easily trimmed, sanded, plastered, or painted to achieve a seamless, finished appearance.
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Installation and Perimeter Sealing: Permanent installation and sealing of door frames, window frames, and curtain walling.
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Gap and Joint Filling: Sealing gaps around pipe and cable penetrations, filling joints between building elements.
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Insulation Enhancement: Filling hollow spaces in walls, roofs, and floors to improve thermal and acoustic insulation.
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Fire Safety Upgrades: Providing a supplemental fire-retarding seal in areas where a certified B2 material is specified, contributing to compartmentation.
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