Best Expanding Foams 2026

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Last Updated - 27.03.2026

Best Choice

01

Soudal

Soudafoam B2 Gun Foam Mounting Foam PU Foam Set of 6 with Cleaner 500 ml

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15% Off
9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Excellent adhesion to almost all building surfaces

39,00 € 45,99 €(15% Off off)
02

Soudal

Soudafoam B2 Gun Foam Mounting Foam PU Foam Set of 6 with Cleaner 500 ml

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15% Off
9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Excellent adhesion to almost all building surfaces

39,00 € 45,99 €(15% Off off)
03

fischer

fischer Gun Foam PUP S 750, Expanding Foam for Backfilling, Insulation and Damping, Airtight and Waterproof Construction Foam for Foam Guns, 750 ml

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Universal: The airtight, water-pressure-resistant gun foam with tested joint sound insulation and thermal insulation is suitable for window and door insulation or for sealing well shafts
Manufacturing: The low amount of foam expansion during curing avoids the need for reworks and so ensures quick and easy processing
Contents: 1 x fischer gun foam PUP S 750 B2 (750 ml), without protective gloves, only suitable for commercial use! Target group:
Building materials: Adheres to all standard building materials, e.g. Concrete, anodised layer, plasterboard, wood, sand-lime brick, PVC materials (including resins with high degree of polymerisation – HPVC), masonry, metals, plaster
Applications: Insulate and fill window connection joints, window sills and roller shutter boxes, wall openings, cavities, wall connections and finished elements and much more

6,95 €
04

fischer

fischer Gun Foam PUP S 750, Expanding Foam for Backfilling, Insulation and Damping, Airtight and Waterproof Construction Foam for Foam Guns, 750 ml

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Universal: The airtight, water-pressure-resistant gun foam with tested joint sound insulation and thermal insulation is suitable for window and door insulation or for sealing well shafts
Manufacturing: The low amount of foam expansion during curing avoids the need for reworks and so ensures quick and easy processing
Contents: 1 x fischer gun foam PUP S 750 B2 (750 ml), without protective gloves, only suitable for commercial use! Target group:
Building materials: Adheres to all standard building materials, e.g. Concrete, anodised layer, plasterboard, wood, sand-lime brick, PVC materials (including resins with high degree of polymerisation – HPVC), masonry, metals, plaster
Applications: Insulate and fill window connection joints, window sills and roller shutter boxes, wall openings, cavities, wall connections and finished elements and much more

6,95 €
Value for Money

05

Pattex

Pattex 1996887"Classic" Assembly Foam, White, 500 ml

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27% Off
9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Intended use: filling and insulating door and window frames; filling and insulating wall openings and cavities, e.g. pipe feedthroughs, roller shutter boxes, etc.
Insulation of components against heat, cold, sound and draughts
Foam volume: 500 ml makes 22 litres; temperature resistance: -40 °C to + 110 °C
Fast curing; can be cut after 1 hour; good dimensional stability: no volume shrinkage and only low post-stretching
Excellent adhesion to almost all building surfaces; resistant to ageing (not UV resistant)

6,99 € 9,62 €(27% Off off)
06

Pattex

Pattex 1996887"Classic" Assembly Foam, White, 500 ml

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27% Off
9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Intended use: filling and insulating door and window frames; filling and insulating wall openings and cavities, e.g. pipe feedthroughs, roller shutter boxes, etc.
Insulation of components against heat, cold, sound and draughts
Foam volume: 500 ml makes 22 litres; temperature resistance: -40 °C to + 110 °C
Fast curing; can be cut after 1 hour; good dimensional stability: no volume shrinkage and only low post-stretching
Excellent adhesion to almost all building surfaces; resistant to ageing (not UV resistant)

6,99 € 9,62 €(27% Off off)
07

fischer

fischer Rapid Installation Foam PU S 750, Construction Foam for Backfilling, Insulation and Damping, Polyurethane (PU) Foam, incl. Instant Use Adaptor 750 ml

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38% Off
9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Ready for use: The quickly-mounted adapter allows for immediate use. No additional processing devices are required
Contents: 1 x fischer foam PU S 750 B2 (750 ml) with an adapter, without protective gloves, only suitable for commercial use
Building materials: Adheres to all standard building materials, e.g. Concrete, anodised layer, plasterboard, wood, sand-lime brick, PVC materials (including resins with high degree of polymerisation – HPVC), masonry, metals, plaster
Applications: For insulating and filling window connection joints around window sills as well as roller shutter boxes, finished elements, wall connections, wall openings and cavities and much more
All-rounder: The rapid installation foam with proven high level of sound insulation and water pressure resistance is suitable e.g. for window joints or for bonding concrete shaft rings

7,83 € 12,59 €(38% Off off)
08

fischer

fischer Rapid Installation Foam PU 500, Building Foam for Backfilling, Insulation and Damping, Polyurethane (PU) Foam, incl. Quickly-Mounted Adapter for Instant Use and Reuse, 500 ml

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35% Off
9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Reliable damping and insulation: The waterproof expanding foam is ideal for sound insulation and ensures a reduction of noise, while providing good thermal insulation, e.g. when working with roof trusses
Practical, no additional foam gun needed: To process the polyurethane (PU) foam, you do not need a separate processing device, as the quickly-mounted, lockable adapter ensures it is ready to use immediately, so that opened dispensers can be reused
For numerous building materials: The polyurethane foam adheres reliably to all standard building materials, such as Concrete, anodised layer, plasterboard, sand-lime brick and masonry – thanks to the tested water pressure resistance, the foam is also ideal as a special foam for well shafts
Contents: 1 x 500 ml rapid installation foam PU 1/750 (item no. 50426), construction foam with German building authority certificate. B2 fire rating, incl. Protective gloves from fischer
Areas of application: The filling foam is suitable for the insulation and filling of finished elements, window connection joints, for installing window sills, roller shutter boxes as well as in roof construction, construction with drywall, for gluing and sealing shaft rings and much more

7,90 € 12,09 €(35% Off off)
09

AquaForte

AquaForte Landscaping Mounting Foam 500 ml

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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PET ACCESSORIES
Aquaforte Landscaping Mounting Foam 500ml
AquaForte

13,19 €
10

AquaForte

AquaForte Landscaping Mounting Foam 500 ml

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14% Off
8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

PET ACCESSORIES
Aquaforte Landscaping Mounting Foam 500ml
AquaForte

11,00 € 12,77 €(14% Off off)