Soudal B2 Genius Gun Fire & Acoustic Expanding Foam 600ml

Product Overview

Soudal B2 Genius Gun Fire & Acoustic Expanding Foam in a 600ml aerosol can is a one-component, self-expanding polyurethane foam designed for sealing, filling, and insulating where enhanced fire protection is required. 

Developed for professional passive fire protection, it provides a reliable barrier against the spread of fire, smoke, air, and moisture in structural gaps and penetrations.

The foam cures with ambient moisture to form a dense, semi-rigid cellular structure offering both fire resistance and acoustic insulation. 

Once cured, it remains stable under temperatures from -40°C to +90°C, maintaining structural integrity and long-term adhesion to most construction substrates including masonry, timber, and metals.

Equipped with the patented Genius Gun adapter system, the 600ml can allows precise, single-handed application with full control over flow and dosage, reducing waste and ensuring even filling of cavities. 

The formulation is completely free from HCFC and CFC propellants, providing a more sustainable, environmentally responsible alternative.

With an expansion rate of approximately 135% during curing and minimal post-expansion once set, Soudal B2 Genius Gun foam ensures consistent joint sealing, excellent acoustic reduction (58 dB), and thermal conductivity of just 35.4 mW/m·K. 

Features & Benefits

• Fire Resistance (B2 Rated): Classified according to DIN 4102 as B2, offering effective flame-retardant performance in fire-rated construction joints and penetrations.
• High Filling Capacity: Expands up to 135% during curing to fill large gaps, voids, and irregular cavities efficiently.
• Excellent Adhesion: Bonds strongly to most building materials including concrete, brick, stone, wood, and metal, excluding PE, PP, and PTFE.
• Acoustic Insulation: Delivers high sound reduction performance up to 58 dB, ideal for noise control in partition and service wall applications.
• Thermal Insulation: Reduces heat transfer with a thermal conductivity value of 35.4 mW/m·K, enhancing energy efficiency in building envelopes.
• Stable and Durable: Maintains volume and structure with less than 5% shrinkage and no post-expansion after curing, ensuring lasting results.
• Environmental Safety: Propellant gases are HCFC- and CFC-free, ensuring no harm to the ozone layer or greenhouse contribution.
• Ease of Application: The Genius Gun system allows precise, comfortable, and controlled one-hand use without the need for additional tools.
• Temperature Resistance: Retains structural performance between -40°C and +90°C once fully cured, ensuring dependable use in varied environments.
• Size – 600ml Aerosol: Each 600ml can yields approximately 25 litres of free-foamed material or up to 18 metres of filled joint, ensuring efficient on-site coverage.

Applications

• Passive Fire Protection: Seals joints, service penetrations, and gaps in fire-rated wall and floor systems.
• Window and Door Installations: Provides airtight and fire-retardant sealing around window and door frames.
• Expansion and Connection Joints: Prevents air, moisture, and sound leakage through construction joints.
• Pipe and Cable Penetrations: Forms a stable, insulating seal around service entries in walls and ceilings.
• Thermal and Acoustic Insulation: Improves sound and heat control around structural elements.
• General Construction Sealing: Suitable for cavities, roof openings, and partition wall installations requiring high insulation and stability.

Installation Guidance

• Surface Preparation: Ensure surfaces are clean, dry, and free from dust, oil, or grease before application.
• Moistening: Lightly moisten surfaces with clean water prior to applying foam to promote adhesion and curing.
• Application: Shake can vigorously for at least 20 seconds, attach the Genius Gun adapter, and fill gaps to one-third of their depth to allow for controlled expansion.
• Layering: For deep cavities, apply foam in layers, re-moistening between layers to ensure full cure.
• Cleaning: Remove uncured foam immediately using Soudal Gun & Foam Cleaner or acetone; cured material must be removed mechanically.
• Storage: Store can upright in a cool, dry place between +5°C and +25°C; ensure nozzle is sealed after use.

Compliance & Performance

• Fire Classification: Rated B2 under DIN 4102 for flame-retardant performance.
• Thermal Conductivity: 35.4 mW/m·K according to EN 17333-5 for high insulation efficiency.
• Sound Reduction: Provides 58 dB acoustic insulation in compliance with EN ISO 717-1.
• Mechanical Strength: Compressive strength approx. 37 kPa; tensile strength 78 kPa; elongation at break 22.7%.
• Density and Structure: Approx. 40 kg/m³ free-foamed density with 70% closed cells for excellent structural stability.
• Water Absorption: Approx. 0.20 kg/m² per EN 29767, providing controlled moisture resistance.
• Curing and Cutting Time: Surface skins within 8.5 minutes; cuttable after approx. 65 minutes at standard conditions.
• Environmental Compliance: Manufactured without HCFCs or CFCs in accordance with environmental safety standards.
• Important Note: Always wear protective gloves and goggles during application. Use only in well-ventilated areas. Cured foam should never be burned; remove mechanically where necessary.