Polyether foam rubber SG 40 (firm): custom cut

  • Maak een afbeelding van een persoon die drukt op een matras met zijn hand. Het gaat om iemand die de hardheid van een matras test
  • Modern bedroom with a large bed, decorative pillows, and a stylish wall partition.
  • Het lijkt alsof de vrouw uit het bed komt.
  • Maak een foto van een kind die springt op een matras. Het moet een foto zijn die ik op mijn website kan plaatsen
£7.50 GBP
£7.50 GBP £0.00 GBP
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  • Free shipping
  • High quality
  • Fast delivery

Choose firmer, longer-lasting support with SG40 polyether foam—custom-cut to fit perfectly. A smart, budget-friendly alternative to HR foam for daily-use seating and mattress cores.

Why you’ll love it

✔️ Firmer, supportive feel — helps maintain posture and shape

✔️ Improved durability — higher density resists sagging and wear

✔️ Custom cut — exact length, width and thickness for a clean fit

✔️ Reliable shape recovery — holds edges and profiles well

✔️ Cost-effective — solid performance without HR pricing

Best for

✔️ Everyday seat cushions (sofa, dining, benches, window seats)

✔️ Mattress cores with a medium-firm feel

✔️ Camper, caravan and boat seating used daily

✔️ Base layer under a soft topper for comfort + support

Tip: Pair SG40 as the supportive base with a 2–4 cm memory-foam topper for premium comfort and pressure relief.

 

Lifespan

Polyether SG40 has a lifespan of 8 to 12 years under normal use and remains firm and resilient over time.

Dimensions

This product is custom-made. You can choose from the following dimensions:

Length: 10 – 300 cm

Width: 10 – 140 cm

Thickness: 3 – 20 cm

Need a larger size? Please contact us to discuss the possibilities.

Note: Foam larger than 200 cm will be glued as standard. A deviation of 1 to 2 mm is also possible.

Applications

Polyether SG40 is an excellent foam for cushions and other applications that are used intensively. It offers a strong combination of firmness and resilience, allowing it to retain its shape and support over time—even with frequent use.

Forming

After shipping, foam typically needs 1 day to return to its original dimensions.

Colour

The colour of this product may differ slightly from the image.
Wil je een afbeelding maken met een persoon die schuimrubber op maat maakt met een machine

For all imaginable applications

Make your own garden cushions, refill your sofa, or create a soft dog bed? Our products are suitable for countless applications.

Curious which type of foam is best for your project? Check out our “Applications” section. Don’t see your application listed? Feel free to contact one of our product specialists for tailored advice.

Soft and responsive

memory foam SG50 is a popular choice for mattresses.

Medium firmness

Polyether SG35 and cold foam SG40 both offer a medium level of firmness.

Very firm

The firmest types of foam are Polypress SG120, Polyether SG40, and SG25.

  • Maak een foto van een kind die springt op een matras. Het moet een foto zijn die ik op mijn website kan plaatsen

  • Did you know?

    Foam rubber can significantly extend the life of your furniture. By replacing only the worn-out filling instead of buying entirely new cushions or sofas, you reduce waste and minimize your environmental footprint. It's a simple and sustainable way to keep your comfort – and the planet – in great shape.