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Bond It B2 EXPANDING PU FOAM Gun Grade 750ml


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Bond It B2 EXPANDING PU FOAM Gun Grade 750ml

Product Information

B2 rated polyurethane foam filler. The cured foam is a good temperature and sound insulator and has strong adhesive properties. Used for installation of doors and windows, insulation and fixing of pipework, filling gaps and holes, fixing wall panels and roof tiles and for thermal insulation. Supplied in aerosol and gun grade versions.

Conforms to Class B2 DIN 4102 PART 1.


Window setting (where a clean and controlled backfill is required), entrance door linings, any kind of small break-throughs in walls and other cavities.

  • Quick curing.
  • For filling, fixing and insulating.
  • Expanding volume – 50-70%.
  • Conforms to the European standard.

The use of this product in certain fire-rated situations may breach Building Regulations – if in doubt consult your local Building Control Officer. For maximum fire resistance, the cured foam should be overcoated with Bond It

Please note: this foam will burn in contact with flames but will self-extinguish when the source of flame is removed.

The foam can be used at temperatures from +5°C to +30°C. The cured foam is semi-rigid and predominantly close-celled. It is resistant to temperatures ranging from -40°C to +100°C and to ageing, but not to UV-rays. Noise and heat insulation values are excellent.


All surfaces to be bonded must be firm, clean, dry and free from dust, grease or contaminants that may hinder the adhesion. Surfaces must be moistened well with water. It is advisable to apply a primer well penetrating into the ground if necessary. All construction components must be properly prepared prior to foam application. It is advisable to have a Foam Cleaner at hand. The ideal working temperature for both the can and environment is +20°C. Chilled cans must be carefully warmed in luke-warm water before usage. However, the can must not be heated above  +50°C, as there is a risk of bursting. Cans which are too hot, for example after having been left in a vehicle during summer, must be cooled in water. The can should be shaken occasionally during this process to obtain the required temperature faster.
Prior to work, and before the adaptor is attached, the can must be shaken thoroughly at least 15 – 20 times. Then the adaptor is attached firmly to the valve. Care must be taken not to overtighten the adaptor and not to activate the valve during this process.

How To Use

  • The instructions for the can must strictly be observed.
  • The fresh foam will expand by 2-2½ times.
  • Therefore care must be taken not to overfill joints.
  • Fresh foam spills must be removed immediately within the tack-free time with Foam Cleaner.
  • Cured foam must be removed mechanically or with Bond It CURED FOAM REMOVER.

Please Note: Moisture is needed for an even and rapid curing of the foam. Inadequate moistening or overfilling of joints and cavities may lead to an unwanted post-expansion of the foam. Foam extrusion can be controlled accurately by varying the pressure. For foam extrusion, the valve is pointed down. The valve lever is to be activated carefully. Once a can has been opened, it should be used within four weeks.


Additional information

Weight 1 kg
Dimensions 66 × 66 × 330 cm

Bond It

Manufacturer Part Number







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