10 Best Foam For Sofa Seats in The UK

Last updated on 04/07/2025

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4everPrime High Density Foam White Extra Firm Upholstery Foam Cut To Size for Cushions, Sofa foam, Beds, Foam for Seating, Indoor Outdoor Foam Padding (30 x 28 x 5 inch)

Why We Love It

Unmatched durability for long-lasting use.
Supreme comfort for extended sitting.
Customized fit for tailored solutions.

Main Highlights

UNPARALLELED DURABILITY: Crafted with high-density foam, our 4everPrime Upholstery Foam ensures long-lasting resilience, maintaining its shape and support for years to come. Ideal for sofa cushions foam, foam cushion pads, and sofa foam cushion replacement.
SUPREME COMFORT: Our High-Density Upholstery Foam offers the perfect balance of foam cushion pads and firmness, providing exceptional comfort. Say goodbye to discomfort or sagging, even during extended sitting. Great for foam seat pads and memory foam cut to size UK.
CUSTOMIZED FIT: Our sofa cushions foam is cut to size, enabling you to create tailored seating solutions for dining chairs, sofas, footstools, window seats, and more. Send us a message through Amazon for a FREE competitive quote. Perfect for furniture foam and thick foam.
VERSATILE APPLICATIONS: This foam is ideal for indoor and outdoor furniture, car seats, mattresses, and even dog beds. Our thick foam for seating is a versatile choice that adds comfort and support to various seating and resting areas. Also suitable for seat foam, chair foam, and memory foam sheet.
FIRE-RETARDANT AND SAFE: Complying with all Fire Regulations and British Standards, our foam pads guarantee peace of mind. Feel confident in its fully fire-retardant properties, ensuring safety in any environment. Ideal for ensuring safety in upholstery foam 4 inch thick applications.

ZYNERY 3 Pcs Sofa Cushion Support, 55 x 55cm High-Density Foam Couch Saver Pad for Sagging Seat Curve Furniture Seat Under Cushion Sag Repair

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Why We Love It

High-density foam for support.
Trapezoidal design for shape retention.
Easy to install and use.

Main Highlights

Package Contents: You will receive 3 high-density sofa support cushions, which are made of high-density foam and can improve the sagging problem of the sofa.
Maintain The Original Dhape of The Sofa: The foam couch sofa cushion support adopts a trapezoidal design with a high middle and low sides, which can raise the sunken part in the middle of the sofa and keep the original appearance of the sofa.
Suitable Size: The size of theseat support pad is 55*55*5cm, which is in line with the size of most sofas in the home. The cushion can be well hidden without affecting the appearance of the sofa itself. If you think the size of the cushion is too large, you can cut it at will.
Simple Installation: Put the sofa foam in the middle of the sofa cushion, no stitching is required, and the sofa or seat can be quickly repaired.
Warm Tips: The sofa support is folded during transportation. It is recommended to open it and leave it for 24 hours to restore its shape after receiving it.

DURAFOAM High Density Blue Firm Foam for Cushions, Sofas, Beds, Seats, Campervans, Indoor & Outdoor Padding, DIY - 80 x 20 x 2 Inches

Why We Love It

Outstanding quality ensures longevity.
Ideal for versatile implementations.
Enables easy customisation.

Main Highlights

High-Quality Composition: Crafted from high-density, firm flexible polyurethane, ensuring durability and long-lasting resilience for various applications.
Versatile for Indoor & Outdoor: Ideal for both indoor and outdoor applications, ranging from cushions and beds to art and DIY projects. Outdoor use recommended with a protective cover.
Easy Customisation: Easily cut and shaped to fit any project, this foam can be personalised with minimal effort using a sharp knife, perfect for custom DIY endeavours.
Eco-Friendly and Safe: Manufactured in the UK, our foam meets high British standards, made from sustainably sourced materials and is fire retardant for safety and environmental consciousness.
Diverse Application Range: Perfect for bench seating, dining seats, window seats, stools, seat pads, headboards, office chairs, medium firm mattress toppers, and packaging materials.

DURAFOAM High Density Blue Firm Foam Sofa, Dining Chair, Seat Pad, Cushion, Padding - DF190B (20 x 20 x 4 Inch / ~ 51 x 51 x 10 cm)

Why We Love It

Superior quality ensures durability.
Indoor and outdoor versatility.
Easy, personalised customisation.

Main Highlights

High-Quality Composition: Crafted from high-density, firm flexible polyurethane, ensuring durability and long-lasting resilience for various applications.
Versatile for Indoor & Outdoor: Ideal for both indoor and outdoor applications, ranging from cushions and beds to art and DIY projects. Outdoor use recommended with a protective cover.
Easy Customisation: Easily cut and shaped to fit any project, this foam can be personalised with minimal effort using a sharp knife, perfect for custom DIY endeavours.
Eco-Friendly and Safe: Manufactured in the UK, our foam meets high British standards, made from sustainably sourced materials and is fire retardant for safety and environmental consciousness.
Diverse Application Range: Excellent for campervan and caravan sitting and beds, mattresses, sofas, settees, armchair cushions, footstools, pouffes, and boat cushions and beds.

Lanswood Sofa Cushion Support for Sagging Seat 2Pack 50 x 50cm High-Density Foam Replacement Sofa Seat Support Curved Furniture Seat Under Cushion Sag Repair-Black

Free Shipping

Why We Love It

Revives sagging sofa instantly.
High-density foam for comfort.
Customizable size for any sofa.

Main Highlights

√【Save Your Sagging Sofa】Our sofa cushion support is specially designed for sagging seats, making them supportive like new. Just put the sofa foam cushion replacement under the sofa cushion, and the sofa will be restored instantly in just a few seconds.
√【High Density Foam】Our replacement sofa seat cushions is made of 40D foam, which both soft and firm, support the sofa cushion well and reduces the discomfort of sitting on sagging furniture.
√【Suitable Size】The package contains 2 piece sofa seat support. The size of the sofa sagging support is 50x50cm, the middle thickness is 5cm, and the edge thickness is 3cm. When the size of the replacement sofa cushions is not suitable for your sofa, you can also cut it to get the right size to improve the fit.
√【Curved Design】Our sofa foam cushion replacement has better resistance to deformation and compression, and with its curved design, can improve the comfort and support of your sofa.
√【Widely in Use】This sofa cushion support for sagging seat is perfect for renewing and restoring chairs, recliners, sofas, love seats, chaise lounges, RVs and porches which has removable seat cushions.

2 Pack Sofa Cushion Support for Sagging Seat, 50x 50x5cm Sofa Cushion Support Foam, Furniture Seat Support, High-Density Sag Repair Pad for Loveseats, Chairs & Couches, Enhanced Comfort & Long-Lasting

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Why We Love It

Superior foam provides lasting support.
Middle raise fixes sagging cushions.
Seamless fit for any sofa.

Main Highlights

High-Density Foam for Superior Support Crafted with high-density foam, these sofa repair cushions enhance the firmness and durability of your furniture. They provide excellent support, restoring the shape and comfort of sagging sofa cushions with high rebound and long-lasting performance.
Middle Raised Design to Fix Sagging Specially designed to address sagging sofas, these foam pads lift and stabilize sunken cushions. The middle-raised structure ensures even support, revitalising your couch and extending its lifespan effortlessly.
Perfect Fit for Any Sofa Measuring 50×50cm, these under-cushion supports fit seamlessly beneath most sofa cushions without being visible. Their universal size and discreet design make them suitable for any sofa colour or style.
Quick and Easy to Use Simply place the foam pad under your existing sofa cushion to instantly repair and prevent sagging. Resizable if needed, it’s a hassle-free solution to restore comfort and support to your furniture in seconds.
Convenient Packaging and Support Vacuum-packed for compact shipping, the foam will expand to its full size within a day. Rest assured with our 24-hour customer service, ready to assist with any queries or concerns.

A ATH COLLECTION Upholstery Foam Sheet Premium Quality Cut to Any Size for All type Cushioning Bench, Stool | Window Seat Pads | Sofa, Dinning Chair Pads Replacement Pet Bed (170 x 50 x 5cm)

Why We Love It

Enhanced support, pressure reduction.
Perfect for diverse furniture.
High-density foam, ultimate comfort.

Main Highlights

(Enhanced Support): Experience the joy of sitting on well-supported seating that reduces pressure points and enhances posture, providing an inviting space for relaxation and comfort.
(Upgrade your Furniture): Our Upholstery Foam with efficient uses in single mattress corner sofa, mattress topper, office desk chair or 2 seater 3 seater 4 seateer Rattan chair, wheelchair accessories & for car seat cushion or even in garden cushions.
(Supre Comfort): Our High-Density Upholstery Foam offers the perfect balance of foam cushion pads and firmness, providing exceptional comfort. Say goodbye to discomfort or sagging, even during extended sitting. Great for foam seat pads and memory foam cut to size UK.
(Airy & Non-Allergenic): Design for chemical-free use, employ our foam in garden furniture cushions floor cushion outdoor kitchen outdoor chair firm mattress topper large cushions floor cushions car seat back support car foam gel seat cushion.
(High-Density Foam): Presents a replacement seat foam designed for camper vans, sofas, and seating applications. This high-density upholstery foam sheet provides firm support, ensuring a comfortable experience. It can easily be cut to fit seats, sofas, dog beds, and mattresses.

TANYOO Sofa Cushion Support for Sagging Seat Curve Furniture Seat Under Cushion Sag Repair -1Pack

Free Shipping

Why We Love It

Easy to use repair.
Improves comfort drastically.
Cuttable, adaptable design.

Main Highlights

Easy to Use: Sofa support under cushions can effectively repair and prevent sagging; Just put our couch cushion supporter under the old sofa cushion; Fix your sagging furniture cushions easily in seconds
Repair Comfortable Sitting: Our couch fixer saggy is more convenient and comfortable during use, you won’t feel a hard wood or plastic when you sit down like chipboard or sofa foam insert
Suitable Size: The size of couch saver support is 20 × 20 × 2 inches, this size can be perfectly integrated into the sofa cushion underneath; It will not be obviously revealed from underneath of the sofa cushion
High Density Foam: Sofa sag repair is made of 32D high-density foam with high firmness, it can well improve the support of the sofa cushion; High rebound and high durability can better repair the sofa sagging
Curved & Cuttable Design: The curved design have better Anti-deformation capacity and compressive performance, it can repair sagging better; The foam can be easily cut to improve the fit

Lanswood Sofa Cushion Support 2Pack 50cm x 50cm High-Density Foam Replacement Sofa Seat Support Curved Furniture Seat Under Cushion Sag Repair (Light Gray)

5% OffFree Shipping

Why We Love It

Restores sagging sofas instantly.
High density foam for comfort.
Curved design enhances support.

Main Highlights

【Save Your Sagging Sofa】Our sofa cushion support is specially designed for sagging seats, making them supportive like new. Just put the sofa foam cushion replacement under the sofa cushion, and the sofa will be restored instantly in just a few seconds.
【High Density Foam】Our replacement sofa seat cushions is made of 35D foam, which both soft and firm, support the sofa cushion well and reduces the discomfort of sitting on sagging furniture.
【Suitable Size】The package contains 2 piece sofa seat support. The size of the sofa sagging support is 50x50cm, the middle thickness is 5cm, and the edge thickness is 3cm. When the size of the replacement sofa cushions is not suitable for your sofa, you can also cut it to get the right size to improve the fit.
【Curved Design】Our sofa foam cushion replacement has better resistance to deformation and compression, and with its curved design, can improve the comfort and support of your sofa.
【Widely in Use】This sofa cushion support for sagging seat is perfect for renewing and restoring chairs, recliners, sofas, love seats, chaise lounges, RVs and porches which has removable seat cushions.

GIONAR 50 x 50cm Sofa Cushion Support, Sofa Repair Foam, Furniture Seat Support,High-Density Sag Repair Replacement for Sofa Couch Loveseat Chair

Free Shipping

Why We Love It

High density foam support.
Improves cushion stability.
Easy and quick repair.

Main Highlights

【High Density Sofa Support Cushion】Foam seat pads for furniture, furniture foam is made of high-density foam with high firmness,it can well improve the support of the sofa cushion. High rebound and high durability can better repair the sofa sagging.
【Padded Sofa Under Cushion Support,Sponge Sofa Support Pad】Couch sofa cushion support measures about 50×50cm, this size can perfectly fit under the sofa cushion without showing, no matter what color your sofa is suitable.
【Couch Saver,Middle Raised Design】Our foam couch sofa cushion support is specially designed for sagging sofas, saving the sofa with a sunken middle, lifting sags and making the cushion more stable again.
【Sofa Seat Support,Easy to Use】Sofa support under cushions can effectively repair and prevent sagging. Just put our couch cushion supporter under the old sofa cushion,fix your sagging furniture cushions easily in seconds. You can also resize by modifying the size.
【Warm Tips】The cushion sag repair replacement is Vacuum packing and can be restored after being opened for a day or so.We promise 24 hours customer support,please feel free to contact us for any product & order problem.

8.8

Excellent

We scanned 1338 products

We reviewed these offers relevant to the Foam For Sofa Seats 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 4everPrime, ZYNERY, DURAFOAM, Lanswood, SuQurtom, A ATH COLLECTION, TANYOO, GIONAR, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Foam For Sofa Seats in the market, we considered we took a deep dive into 6691 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 4everPrime High Density Foam White Extra Firm Upholstery Foam Cut To Size for Cushions, Sofa foam, Beds, Foam for Seating, Indoor Outdoor Foam Padding (30 x 28 x 5 inch). We love many things about this product by 4everPrime. What sets it apart from the competition is Unmatched durability for long-lasting use. , Supreme comfort for extended sitting. , Customized fit for tailored solutions. .
The best value product for most shoppers and where user satisfaction is continuously the highest is ZYNERY 3 Pcs Sofa Cushion Support, 55 x 55cm High-Density Foam Couch Saver Pad for Sagging Seat Curve Furniture Seat Under Cushion Sag Repair by ZYNERY based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Foam For Sofa Seats and the best cost-to-value ratio is Lanswood Sofa Cushion Support 2Pack 50cm x 50cm High-Density Foam Replacement Sofa Seat Support Curved Furniture Seat Under Cushion Sag Repair (Light Gray)at Lanswood with a 5% discount.
Our list of the best Foam For Sofa Seats 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 Foam For Sofa Seats in The UK

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We scanned 1338 products

We concluded that: