Features & Benefits

🔥 4-Hour Fire Resistance – Tested to BS 476-20, EN1366-4, EN13501 & DIN4102-1 standards, this B1-rated expanding foam provides up to 4 hours of certified fire protection for sealing critical joints and voids.

🧱 Multi-Purpose Sealing & Insulating – Ideal for filling and fixing around pipework, electrical cabling, deep joints, irregular gaps, window sills, thresholds, and timber structures. Perfect for interior and exterior use.

🔇 Thermal & Acoustic Insulation – Advanced cell structure offers excellent soundproofing and thermal barrier properties, reducing heat loss and noise transmission in buildings.

⚡ Fast Curing & Paintable Finish – Expands up to 30x its original volume for efficient gap filling, cures quickly, and can be easily cut, painted, plastered, or sanded once dry.

🧤 Convenient & Safe Application – Gun-grade design ensures precise control and minimal waste; includes gloves for safety and clean handling during use.

Description
The 750ml B1 Fire Rated Fill & Fix Expanding PU Foam is a professional-grade polyurethane foam formulated for high-performance fire, heat, and acoustic sealing applications. It delivers a 4-hour fire resistance, making it ideal for use in critical fire safety installations such as around doors, windows, pipe penetrations, and electrical conduits.
This pink-coloured foam expands up to 30 times its original volume, filling voids and irregular gaps with a durable, airtight, and soundproof barrier. It adheres strongly to most construction materials including concrete, brick, metal, and timber.
Suitable for interior and exterior use, it’s fast-curing, CFC-free, and can be cut, painted, or plastered after curing. Ideal for builders, electricians, plumbers, and fire safety professionals seeking reliable insulation and fire-stopping performance.

Our Delivery Options

Express 2/4 Day Delivery

• Delivery Fee:
• Order By: 
• Delivery Time: Before 6pm Monday-Friday

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Next Business Day Delivery

• Delivery Fee:
• Order By: 
• Delivery Time: Before 6pm Monday-Friday

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Pre-12 Next Business Day Delivery

• Delivery Fee: £12.99 delivery for all pre-12 orders
• Order By: 
• Delivery Time: Before 12pm Monday-Friday

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Remote Areas Delivery

• Delivery Fee:
• Order By: 
• Delivery Time: Standard delivery (2-4 days)

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Weekend Delivery

• Delivery Fee:
• Order By:
• Delivery Time: Before 6pm Saturday

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Good To Know

For orders to some addresses, especially in the Highlands of Scotland and Offshore, next day delivery options are not available and delivery can take several days. Saturday delivery is not available for remote areas.

Items over 30kg: Items over 30kg can only be delivered from Monday to Friday. If ordered before 3pm, please allow up to two business days for delivery. Orders placed after 6pm Thursday will be delivered after the weekend.