10 Best Insulation Foam Spray in The UK

Last updated on 04/07/2025

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Demsun P90 Thermal & Acoustic Spray Foam – 12 x 850ml Can | Expanding Polyurethane Insulation Foam for Heat & Soundproofing | Easy to Apply, Strong Adhesion for Walls, Roofs, Floors (12)

Why We Love It

Exceptional heat and sound insulation.
Promotes energy efficiency.
Easy and versatile application.

Main Highlights

Dual Insulation Power – Heat & Soundproofing in One Can Experience superior thermal and acoustic insulation with Demsun P90. Ideal for reducing heat loss and dampening noise, it creates a more comfortable and energy-efficient indoor environment.
Expands Up to 3cm – Perfect for Gaps & Uneven Surfaces This high-performance PU foam expands seamlessly to fill cracks, joints, and voids, ensuring airtight insulation with minimal effort. One can covers more than you expect.
Strong Adhesion on All Building Materials Whether you're working with concrete, wood, metal, stone, or plaster, Demsun P90 bonds firmly to almost any surface—making it ideal for both renovation and construction projects.
Fast & Easy Application – DIY Friendly Designed for effortless use with standard foam guns, the formula cures quickly and applies smoothly, saving time while delivering professional-grade results—perfect for both professionals and DIYers.
Reliable Performance – Water-Resistant & Durable Once cured, the foam forms a tough, water-resistant barrier that resists shrinkage, movement, and weathering. Built to last in roofs, floors, walls, attics, basements, and more.

Bond-It Fill & Fix Mate

Kit - 6 x 750ml Expanding Foam Cans, 1 x Professional Gun, 1 x 500ml Gun Cleaner PU Grade

Why We Love It

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Main Highlights

Kit 6 x 750ml Expanding Foam Cans 1 x Professional Gun 1 x 500ml Gun Cleaner PU Grade
Brand : Bond It Fill and Fix Mate
Product type: TOOLS

Demsun P90 Expanding PU Foam 3-Pack – High Expansion Insulation Foam, Gap Filler, Crack Sealant, Soundproof & Thermal Spray, Moisture Resistant, Paintable for Walls, Roofs, Floors & DIY

Why We Love It

Powerful insulation against elements.
Rapidly fills gaps and cracks.
Mold-resistant for lasting durability.

Main Highlights

Thermal & Acoustic Insulation High-density polyurethane foam provides powerful insulation against heat, cold, and sound, improving energy efficiency and comfort in homes and buildings.
Expands to Fill Gaps & Cracks Expands rapidly to seal and fill cavities, joints, and hard-to-reach areas with excellent adhesion to wood, metal, concrete, and plastic surfaces.
Moisture & Mold Resistant Formula Engineered with a closed-cell structure to resist water absorption and prevent mold, mildew, and decay—ideal for wet and humid environments.
Fast Curing & Paintable Surface Dries quickly into a solid structure within minutes and is ready to be trimmed, sanded, and painted—perfect for professional and DIY use.
Multi-Purpose Use - Ideal for use in insulation of roofs, windows, doors, wall cavities, pipes, and HVAC areas. Suitable for home improvement, construction, and repairs.
Paintable Finish Once cured, the foam can be sanded, trimmed, and painted for a clean, professional look.
Long-Lasting & Durable Demsun P90 provides lasting results with its durable, high-performance foam that resists moisture and wear over time, making it an ideal choice for both residential and commercial applications.
Versatile Use Perfect for insulating roofs, walls, crawl spaces, and other hard-to-reach areas. Whether you’re upgrading your home’s energy efficiency or improving sound control, P90 offers a reliable solution.

6 x Soudal Genius Gun Insulation Foam 750ml can

EXPANDING FOAM FILLER GUN GRADE (BOX OF 12) 750ML SOUDAL

Why We Love It

Show has compelling storyline.
Features excellent character development.
High-quality production design.

Main Highlights

EXPANDING FOAM FILLER GUN GRADE BOX OF 12 750ML SOUDAL
Brand : Soudal
Product type: HARDWARE

6 x Gap Filler Expanding Foam Soudal Gun Grade 750ml PU Polyurethane Foam Can

37% Off

Why We Love It

Ready to use anytime.
Eco-friendly, high filling capacity.
Cures quickly, adheres excellently.

Main Highlights

Ready to use from can - one-component with no mixing
High filling capacity - yields 3.1 litres per can
Environmentally friendly - free of Freon, HCFC and CFC
Quick curing - cut within 25 minutes
Excellent adhesion - bonds most surfaces

500ml Gap Expanding Foam Filler PU Expansion Insulation BONDING Filling - 1x

Why We Love It

Seals gaps and cracks effectively.
Excellent for insulation purposes.
Ideal for various applications.

Main Highlights

500ml GAP EXPANDING FOAM FILLER PU EXPANSION INSULATION BONDING FILLING HLU Roof tile voids and draught points around the home. Gaps around pipe entries through walls. Gaps around window frames, door frames. Electrical wire chasing prior to plastering. Deep joints prior to applying sealant or plaster. Gaps and cracks in walls and floorboards.

2 x Cans Of The Original Gorilla Filler Weatherproof expanding foam 500ml Each

3% Off

Why We Love It

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Main Highlights

2 X Cans Of The Original Gorilla Filler Weatherproof Expanding Foam 500Ml Each
2 x Cans Of The Original Gorilla Filler Weatherproof expanding foam 500ml Each
Color: Stone
Stone
500ml

Gorilla Heavy Duty Expanding Foam 353ml - Multi-Purpose, Durable & Seals out Air, Moisture & Pests | No Shrinkage & Maximum Seal | For Indoor & Outdoor* Use

6% OffFree Shipping

Why We Love It

Secures against air and moisture.
Accessible for numerous applications.
Ensures seamless, durable sealing.

Main Highlights

*For outdoor applications, cured foam must be painted or coated. Exposure to sunlight may cause discolouration.
HEAVY DUTY GAP FILLING: Seal gaps and cracks up to 2.5cm with Gorilla Heavy Duty Expanding Foam. Its multi-purpose formula creates a lasting, heavy-duty seal, effectively keeping out air, moisture, and pests for a reliable solution.
MULTI-PURPOSE: Gorilla Heavy Duty Expanding Foam offers no shrinkage and a maximum seal. The foam becomes tack-free in 8-12 minutes, allowing trimming in 45 minutes. It is also paintable and sandable to adapt to any DIY project.
INDOOR & OUTDOOR USE: Perfect for DIY projects indoors and outdoors. For outdoor applications, ensure the cured foam is painted or coated to prevent potential discoloration caused by sunlight exposure
GAP FILLING: Gorilla Heavy Duty Expanding Foam offers a long-lasting, heavy-duty seal that effortlessly fills the smallest gaps. With zero shrinkage on fixes in attics, plumbing, vents, ceilings, ducts, doors, and windows, providing a seamless finish.
FOR USE ON: Suitable for various materials and applications, including PVC, brick, concrete, insulation materials, plaster, wood, metal, and more. It's also suitable for ducts, doors, windows, and skylights

Soudal Genius Gun Insulation Foam 750ml can

Why We Love It

Accurate trigger control.
Exact dosage every time.
Re-useable and reliable.

Main Highlights

Accurate trigger control.
Exact Dosage.
Re-useable.

8.7

Excellent

We scanned 1444 products

We reviewed these offers relevant to the Insulation Foam Spray within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Demsun, Bond-It Fill & Fix Mate, Soudal, Truly PVC Supplies, SFM Rapide, JKG Unknown, Gorilla, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Insulation Foam Spray in the market, we considered we took a deep dive into 7221 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Demsun P90 Thermal & Acoustic Spray Foam – 12 x 850ml Can | Expanding Polyurethane Insulation Foam for Heat & Soundproofing | Easy to Apply, Strong Adhesion for Walls, Roofs, Floors (12). We love many things about this product by Demsun. What sets it apart from the competition is Exceptional heat and sound insulation, Promotes energy efficiency, Easy and versatile application.
The best value product for most shoppers and where user satisfaction is continuously the highest is Kit - 6 x 750ml Expanding Foam Cans, 1 x Professional Gun, 1 x 500ml Gun Cleaner PU Grade by Bond-It Fill & Fix Mate based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Insulation Foam Spray and the best cost-to-value ratio is 6 x Gap Filler Expanding Foam Soudal Gun Grade 750ml PU Polyurethane Foam Canat Truly PVC Supplies with a 37% discount.
Our list of the best Insulation Foam Spray is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Insulation Foam Spray in The UK

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We scanned 1444 products

We concluded that: