B1 Fire Resistant Expanding Gun Grade PU Foam – 750ml

Bond It B1 Fire Foam Aerosol Grade Fire Rated PU Expansion Foam is a high-performance, one-component, moisture-curing polyurethane expanding foam, fire rated and tested to BS EN 1366-4, EN13501-2+A1:2013 and DIN 4102 B1. Supplied in a convenient straw aerosol (750ml), it is designed for trade professionals and DIY users who need a reliable, compliant fire-resistant gap filler for construction and passive fire protection applications. The foam expands over 40 times its can volume, delivering controlled, high-volume fill with excellent thermal and acoustic insulation properties.

Key Features and Specifications

• Fire Rating: B1 classification to EN1366-4+A1:2010, EN13501-2+A1:2013 and DIN 4102 Part 1 — up to 4 hours fire resistance
• Format: Straw aerosol (hand-held), 750ml canister — no foam gun required
• Colour: Pink (for easy identification on site)
• Expansion: Expands over 40 times its can volume for effective gap filling
• Composition: One-component, moisture-curing polyurethane prepolymer; CFC-free and H-CFC-free propellant compliant with EU regulations
• Cured foam structure: Semi-rigid, predominantly close-celled
• Application temperature: +5°C to +25°C
• Service temperature range: -40°C to +100°C (short-term up to +130°C)
• Adhesion: Bonds to wood, concrete, stone, plaster, metal, PVC, and polystyrene; does not bond to polyethylene, silicone, oil/grease, PTFE, or bituminous substrates
• UV resistance: Not UV-resistant — cover with opaque sealant, paint, or filler after curing
• Catalogue reference: BDEFR750

Applications

• Installing window and door frames where clean, controlled backfilling is required
• Sealing service penetrations and cable/pipe pass-throughs in fire-rated walls and floors
• Filling holes and irregular gaps in masonry, concrete, and timber structures
• Sealing and connecting joints in thermal and acoustic insulation boards
• Reducing thermal bridges to improve overall building energy performance
• Passive fire protection sealing in commercial, residential, and industrial builds

Note: This product has been tested for fire resistance for joints and penetration seals. It is not suitable as a fire-resistant seal around designated fire doors.

Why Choose This Product

• Certified compliance: Independently tested to EN1366-4, EN13501-2, and DIN 4102 B1 — meets stringent UK and European passive fire protection standards
• No foam gun needed: Straw aerosol format makes it quick and easy to apply on site without additional equipment
• Dual insulation benefit: Provides both thermal and acoustic insulation in a single application
• Minimal post-expansion: Low curing pressure means the foam does not shrink after curing, keeping joints stable and deformation-free
• Eco-friendly propellant: CFC-free and H-CFC-free, compliant with the latest EU environmental regulations
• Trade-trusted brand: Bond It is a well-established UK manufacturer of construction sealants, adhesives, and foams

Delivery in and Around London

We deliver the Bond It B1 Fire Foam Aerosol Grade Fire Rated PU Expansion Foam to trade and DIY customers across London and the surrounding region. Inner London boroughs served include Croydon, Lewisham, Southwark, Camden, and Hackney, with Greater London coverage extending to Enfield, Bexley, Redbridge, and Barnet. We also supply customers throughout the surrounding counties of Kent, Essex, Surrey, and Hertfordshire. Single cans and trade case quantities (box of 12) are available. Contact us for bulk pricing and next-day delivery options.