Soudal B2 Fire & Acoustic Expanding Foam 750ml (Gun Grade & Handheld)

High-Performance Fire-Rated and Acoustic Polyurethane Foam

The Soudal B2 Fire & Acoustic Expanding Foam is a premium, single-component fire-retardant polyurethane foam engineered for professional sealing, filling, and insulating applications where fire resistance, soundproofing, and thermal insulation are essential. Available in both Gun Grade and Handheld formats, this product is ideal for use in residential, commercial, and industrial construction projects, particularly where safety and regulation compliance are critical.

Key Features & Benefits

Fire Resistance Up to 2 Hours

• Tested to EN 1366-4 standards for fire resistance.

• Provides up to 2 hours of fire protection, depending on joint configuration.

• Certified under DIN 4102 B2 fire classification for fire-retardant performance in construction materials.

• Ideal for sealing penetrations, linear joints, gaps around doors, pipe entries, and cable trays where fire integrity must be maintained.

Superior Acoustic Insulation

• Acoustic performance rated at 58 dB, making it an excellent choice for sound insulation in partitions, floor gaps, ceilings, and door surrounds.

• Helps improve living comfort and privacy by reducing airborne noise transmission.

Thermal Insulation Performance

• Delivers a low thermal conductivity rating of 36 mW/mK, enhancing energy efficiency by reducing heat loss through joints, frames, and structural gaps.

• Supports regulatory compliance for energy-efficient buildings and passive house standards.

Strong Expansion & Bonding Properties

• Rapidly expands on application to seal large voids and irregular gaps.

• Adheres strongly to most common construction materials including concrete, brick, wood, metal, plastics (except PE, PP, PTFE), and more.

• Fills and insulates while maintaining long-term structural stability.

User Convenience Two Application Formats

• Gun Grade version allows precise control and professional application for larger installations or ongoing work.

• Handheld version is ideal for smaller-scale use, quick repairs, or where a foam applicator gun is unavailable.

Ideal Applications

• Fire-rated sealing around door and window frames

• Acoustic insulation in partition walls and ceiling cavities

• Firestopping around cables, pipes, ducts, and conduits

• Filling gaps between walls, floors, and ceilings

• Insulating voids behind cladding panels and roofing elements

• Ensuring air-tightness and thermal insulation in low-energy buildings

Product Variants

Product Application Method Boxed Weight Soudal B2 Fire & Acoustic Foam Gun Grade Foam Applicator Gun 890g Soudal B2 Fire & Acoustic Foam Handheld Direct from Canister 875g

Technical Specifications

Property Value Fire Resistance Up to 2 hours (EN 1366-4) Fire Classification DIN 4102 B2 (Fire-retardant) Acoustic Rating 58 dB Thermal Conductivity 36 mW/mK Expansion High-volume expansion Application Temperature +5C to +30C (can), +10C to +35C (ambient recommended) Surface Adhesion Excellent on concrete, masonry, timber, metals, and plastics Paintable After curing Cutting Time Approx. 3060 minutes (depending on temperature and humidity) Cure Time Full cure in approx. 24 hours Shelf Life 1218 months (stored upright in original packaging)

Frequently Asked Questions (FAQs)

Q: What does B2 fire rating mean?
A: B2 under DIN 4102 indicates that the product is normally flammable but self-extinguishing, making it suitable for construction environments requiring basic fire-retardant protection.

Q: Can this foam be used in vertical and horizontal applications?
A: Yes. The foam adheres well and expands to fill voids in both horizontal and vertical orientations.

Q: What is the difference between the Gun Grade and Handheld versions?
A: The Gun Grade is designed for use with a foam applicator gun, allowing more precise and controlled application. The Handheld version is a self-contained canister with an integrated nozzle for quick and simple use.

Q: Is it suitable for use in acoustic panels or soundproof rooms?
A: Yes. With an acoustic rating of 58 dB, it is ideal for soundproofing applications, especially in residential developments, studios, schools, and offices.

Q: Can I sand, cut, or paint the foam after application?
A: Yes. Once fully cured, the foam can be cut, sanded, plastered, or painted over to match the surrounding surface.

Why Choose Soudal B2 Fire & Acoustic Expanding Foam?

• Combines fire resistance, soundproofing, and thermal insulation in one easy-to-apply product

• Tested and certified to international standards

• Available in Gun Grade and Handheld formats for all project sizes

• Backed by Soudals reputation as a global leader in sealants and foams

Soudal B2 Fire & Acoustic Expanding Foam Multi-functional protection for modern buildings where safety, performance, and acoustic comfort matter most.