MAX 750ml Handheld Expanding Foam – B3 General Purpose Gap Filler

Product Name

MAX 750ml Handheld Expanding Foam – B3 General Purpose Gap Filler

Overview

The MAX 750ml Handheld Expanding Foam – B3 General Purpose Gap Filler is a single-component polyurethane foam designed for professional hand application using the supplied nozzle, eliminating the need for additional tools. It delivers high yield performance, expanding to approximately 45 litres, and cures quickly with a typical cutting time of 50–100 minutes to support efficient finishing. Once cured, the foam provides excellent thermal insulation and superior acoustic insulation with noise reduction of up to 60dB, making it ideal for residential and commercial soundproofing applications. The foam conforms to B3 fire class requirements in accordance with DIN 4102-1 Part 1 and can be painted, cut, or trimmed without shrinkage for a clean, durable finish.

Safety Warning: Contains diisocyanates. As from 24 August 2023, adequate training is required before industrial or professional use.

Key Features & Benefits

• Handheld expanding foam supplied with nozzle for immediate use.
• High yield output expanding to approximately 45 litres of cured foam.
• Fast curing with cutting time between 50 and 100 minutes.
• Superior acoustic insulation providing noise reduction up to 60dB.
• Excellent thermal insulation with conductivity of 30–35 mW/m·K.
• Temperature resistant from -40°C to +90°C once cured.
• B3 fire class performance to DIN 4102-1 Part 1 for general purpose use.
• Paintable, cuttable, and trim-able without shrinkage once cured.

Installation & Applications

Designed for handheld application to fill and seal gaps, joints, and cavities. Suitable for installing window and door frames, soundproofing walls and voids, and insulating around electrical outlets and pipework. Apply in layers where required and allow for expansion and curing before trimming or finishing.

Who Is This For?

• Builders and contractors carrying out general gap filling and sealing.
• Window and door installers requiring a handheld foam solution.
• Maintenance teams improving thermal and acoustic insulation.
• Procurement teams specifying B3 general purpose expanding foam.

Competitive Advantages

This handheld expanding foam offers high yield, fast curing, and exceptional acoustic insulation without the need for a foam gun. The inclusion of a nozzle ensures controlled application, while B3 classification clearly positions it as a general purpose foam without confusion with fire-rated alternatives.

Why CMT Group?

CMT Group supplies trade-ready consumables and insulation solutions from trusted brands, including its own brand MAX, helping professional users specify products with confidence.

• UK trade supplier for foams, sealants, and site consumables.
• Clear technical information to support compliance-led purchasing.
• Bulk supply options for contractors and multi-site projects.

Frequently Asked Questions

What is handheld expanding foam used for?
It is used for filling and sealing gaps, joints, and cavities, installing frames, and improving thermal and acoustic insulation.

Does this foam provide soundproofing?
Yes. It provides superior acoustic insulation with noise reduction of up to 60dB.

Do I need a foam gun to use this product?
No. It is supplied with a nozzle for handheld application.

Is training required before use?
Yes. As from 24 August 2023, adequate training is required before industrial or professional use due to the presence of diisocyanates.

Specifications Table

Product Name	MAX 750ml Handheld Expanding Foam – B3 General Purpose Gap Filler
Product Code	HF750
Type	Single-component polyurethane expanding foam
Application	Handheld with supplied nozzle
Can Size	750ml
Yield	Approx. 45 litres
Acoustic Insulation	Noise reduction up to 60dB
Fire Class	B3 to DIN 4102-1 Part 1
Pack Quantity	Supplied in boxes of 12