Flex-Foam B2

Flex-Foam B2
Flexible high insulating polyurethane foam

Zwaluw Flex-Foam B2 was tested and approved by a notified body (0960) as a 1-component flexible insulation polyurethane foam with a high yield. It was specifically developed for sealing and filling joints, seams and connections. Through its unique formulation Zwaluw Flex-Foam B2 can also be used at low temperatures. Zwaluw Flex-Foam B2 was tested according to the directives of the NEN-EN 1026: 2000 to determine the air loss at a pressure up to 1050 Pa. The air loss is 25 times lower than prescribed by the standard. Flex-Foam B2 is suitable for application in details in passive houses and energy neutral homes and buildings. Zwaluw Flex-Foam B2 is part of the product portfolio Sustainable Airtight Building Solutions. These products are tested on thermal insulation, driving rain and air loss. Correctly applied these products can contribute to energy savings of a building and therefore can come into close proximity with concepts such as passive house and energy neutral houses.


  • Tested to 1050 Pa
  • Extremely low air loss, most air tight foam available on the market
  • Suitable for details in energy neutral houses
  • High yield
  • Provides very good sound reduction
  • Fire behaviour B2

Areas of application

Zwaluw Flex-Foam B2 was specifically developed for airtight and thermally insulated joints around window frames and in construction, partition walls, ceiling and floor joints, surface penetration of pipes and tubes through walls and floors. In general, the foam has an excellent adhesion to concrete, brick, stone, plaster, wood, metal and many plastics like EPS and XPS, rigid PU foam and uPVC. Ideally suitable for the connection between plaster blocks and sand-lime bricks.


Shelf life

If kept in unopened original packaging between +5°C and +25°C and stored in a dry place, the shelf life is up to 12 months from production date. Store the canisters in an upright position.

Article number EAN barcode Packaging Content
- - Aerosol 700 ml

Product information such as SKU, ordering and related product information for each product may vary by country. Data displayed at the International website is based on Benelux data.

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