Soudal B2 Fire Rated Expanding Foam Gun Grade 750ml
B2 fire-rated expanding polyurethane foam for sealing, filling, and insulating gaps. Suitable for fire-retardant sealing around joints and openings. Gun grade for precise, one-handed use.
Product Overview
B2 fire-rated expanding polyurethane foam for sealing, filling, and insulating gaps. Suitable for fire-retardant sealing around joints and openings. Gun grade for precise, one-handed use.
Delivery & Returns Information
How Our Delivery Works
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Delivery Areas & Charges
Delivery charges listed on our website apply to mainland UK, excluding the following postcode areas: AB, CF, DD, DG, FK, KW, IV, LA, LD, LL, NP, PA, PH, SA, SY
If your delivery address falls within one of these postcode areas, we’ll be in touch before processing your order to confirm any additional delivery costs.
Please note: We do not currently offer delivery outside the UK mainland.
Standard (Nationwide) Delivery
| Screws & Fixings and Adhesives & Sealants | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £50 | £5 ex. VAT |
| Over £50 ex. VAT | FREE |
| Insulation, Plasterboard and Drylining Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £350 | £35 ex. VAT |
| Over £350 ex. VAT | FREE |
| Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £10 ex. VAT |
| Over £300 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £50 ex. VAT |
| Over £400 ex. VAT | £35 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
Returns
We offer a 30 day returns policy on any faulty products.
Key Features
- {{local_fire_department}} Provides a high level of fire resistance
- {{panorama_horizontal}} Expands to fill larger spaces
- {{update}} Quick setting time
- {{fact_check}} Can be used to fill, fix and insulate
Technical Specification
| Size: | 750ml |
|---|---|
| Sales Unit: | Each |
| Brand: | Soudal |
| Manufacturer's Reference: | 128450 |
Technical Downloads
Product Overview
Soudal B2 Fire Rated Expanding Foam is a one-component, self-expanding polyurethane foam supplied in a 750ml canister for use with a professional foam gun applicator.
This professional-grade B2 fire-rated foam provides reliable sealing, filling, and insulating performance for construction and renovation applications. Its polyurethane composition ensures strong adhesion to most building materials, forming a durable bond that resists air leakage and moisture ingress.
Designed for fire-retardant sealing around joints, gaps, and penetrations, the foam achieves up to 2 hours’ fire resistance in accordance with EN 1366-4, depending on joint configuration. Its dense, closed-cell structure provides effective sound insulation with an acoustic rating of 58dB and excellent thermal performance with a conductivity value of 36mW/mK.
The formulation remains dimensionally stable once cured, eliminating shrinkage or post-expansion to ensure a consistent and long-lasting seal. The HCFC- and CFC-free propellants contribute to a safer environmental profile without compromising application quality.
The gun-grade format enables precise control and accurate dosing, allowing smooth, professional application across larger or more complex sealing projects. Each can delivers high-yield output with uniform expansion for efficient gap filling and insulation performance.
Features & Benefits
- Fire-rated performance: Classified to EN 1366-4 with up to 2 hours’ fire resistance, providing safety assurance in passive fire protection systems.
- Stable expansion: Maintains its volume after curing without shrinkage or post-expansion, ensuring accurate, reliable sealing.
- High adhesion: Bonds securely to concrete, masonry, metal, timber, and plastics for versatile use in mixed-material assemblies.
- Dual insulation: Provides sound reduction up to 58dB and thermal insulation with a conductivity of 36mW/mK, improving comfort and energy efficiency.
- Environmental protection: Formulated with HCFC- and CFC-free propellants, preventing harm to the ozone layer.
- Professional application: Gun-grade formulation designed for use with a foam applicator gun, ensuring controlled dispensing, cleaner finish, and reduced material waste.
- Can size – 750ml: Provides ample volume for multiple sealing or insulation tasks, ensuring efficient material usage per application.
Applications
- Fire-retardant sealing: Around service penetrations, expansion joints, and structural openings.
- Door and window framing: For air-tight, thermally efficient installation of frames and casings.
- Gap and void filling: For walls, floors, and partition interfaces where expansion or soundproofing is required.
- Roof and ceiling openings: Suitable for sealing voids around pipework, ducts, and cable entries.
- Acoustic insulation: Reduces sound transmission in partition walls, floors, and cavity spaces.
- Thermal insulation: Enhances energy retention in HVAC, refrigeration, and building envelope systems.
Installation Guidance
- Surface preparation: Ensure all surfaces are clean, dry, and free from dust, grease, or loose materials before application.
- Application method: Shake the can vigorously and attach it securely to a compatible foam gun applicator before dispensing.
- Dispensing: Apply the foam in layers, filling approximately one-third of the gap to allow controlled expansion.
- Curing time: Allow full curing for approximately 24 hours before trimming or finishing.
- Finishing: Once cured, excess foam may be cut, sanded, or painted as required.
- Safety handling: Use in well-ventilated areas and wear protective gloves during application.
Compliance & Performance
- Fire classification: Tested to EN 1366-4, providing up to 2 hours of fire resistance depending on joint dimensions.
- Thermal conductivity: 36mW/mK, supporting effective energy conservation.
- Acoustic insulation: Rated at 58dB sound reduction.
- Environmental compliance: Free from HCFCs and CFCs; non-ozone-depleting formulation.
- Adhesion strength: Excellent bond to most construction substrates, including concrete, masonry, timber, and plastics.
- Dimensional stability: High resistance to shrinkage and post-expansion for consistent performance.
- Important note: Always follow manufacturer’s safety and usage instructions; contents are pressurised - store and use as directed.
