Bond It B3 Fill & Fix Expanding Foam Aerosol - 750ml

In stock
Regular price £8.00 inc. VAT

A fast setting, multi‐purpose PU foam which bonds, fills, seals and insulates most construction materials.

B3 rated PU foam. Quick, economic and easy to apply. Improves draught and heat insulation, fills irregular gaps, fixes framework and deadens sound.

Product Details: 

  • Brand: Bond It 
  • Volume: 750ml
  • Colour: Buff/Beige
  • SKU: BDFIX750
  • Product Code: 5060021361899
  • UFI: KR80-Y030-300E-HKTM

Key Features:

  • Low curing pressure avoids deformation of building elements.
  • High thermal and acoustic insulation value.
  • Good volume expansion for effective filling.
  • B3 Rating according to DIN 4102‐1.
  • Non‐Shrinking.
  • Bond It B3 FILL & FIX PU FOAM is a one-component polyurethane assembly foam and is based on a moisture curing polyurethane prepolymer.
  • Foam does not shrink after curing keeping the risk of deformation of joints and separation from the surface minimal.


The fresh foam adheres to most common building materials such as wood, concrete, stone, plaster, metal, PVC, and polystyrene. however, it will not stick to surfaces such as polyethylene, Teflon, silicone, oil and grease and similar substrates.

Areas of Application:

  • Installation of window and door frames and entrance door.
  • Linings (where a clean and controlled backfill is required).
  • Filling of holes.
  • Insulation of penetrations.
  • Sealing of thermal and acoustic insulation boards.
  • Sealing and connection of joints.
  • Reducing the impact of thermal bridges.


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 +90°C and to ageing, but not to UV-rays. Noise and heat insulation values are excellent.


  • Surfaces to be bonded must be firm, clean, dry, and free from dust, grease or contaminants that may hinder adhesion. They must be moistened well with water.
  • All construction components must be properly prepared prior to foam application. It is advisable to have 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 (below +45o C) before usage but avoid heating 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 using cold water.
  • Protect adjacent surfaces with paper, plastic film, or other suitable material.
  • The can should be shaken occasionally during this process to obtain the required temperature faster. Prior to work, the can must be shaken thoroughly at least 15-20 times.


As from 24 August 2023 adequate training is required before industrial or professional use.

The instructions for the can must strictly be observed. Use gloves and eye protection and avoid skin contact.

Handheld: Hold the foam can in upright position. Screw the applicator (straw) to the foam can valve.

For application, turn the can upside down and press the applicator trigger. Use the applicator trigger to adjust the foam output.


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 started, it should be used within four weeks.


Cured foam is sensitive to UV light and direct sunlight and therefore should be covered with suitable opaque sealant, filler, paint, or other material. Lighter construction elements must be firmly fixed before application of the foam due to formulas high post expansion.

Shelf Life:

12 months from date of manufacture, when stored according to manufacturer’s instructions in original unopened containers.

Storage Conditions:

Store and transport upright, in cool, dry conditions between +5 and +30°C. (Considerably higher temperatures may reduce the shelf life). Do not store at temperatures over +50o C. Keep away from sources of heat and direct sunlight.


Excess foam can be removed whilst still wet using Bond It GUN FOAM CLEANER or Bond It MULTI-WIPES. Cured foam can only be removed mechanically.

Disposal of Containers:

Do not leave empty containers where residue could be harmful to children, animals or the environment. Replace lids and remove any containers to a central disposal point in accordance with local regulations. Do not pierce can. In the event of spillage remove all sources of ignition, ventilate the area, remove people from confined areas. Material should be mopped up immediately with an inert absorbent material such as sand, collected and placed in a suitable container or allowed to vaporise.

Health & Safety:

Extremely Flammable aerosol. Please refer to separate material safety data sheet for full handling, use and storage instructions. Keep out of reach of children. It contains an environmentally safe propellant, which complies to the latest EU regulations banning all CFC-propellants. It is the user’s responsibility to determine suitability for use. If in doubt, contact our Technical Department for advice.

Note: this information is for general guidance only since site conditions and labour are beyond our control. It is recommended that users make their own tests to determine suitability

Technical Details: