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Closed Cell Foam Sheets UK

Buy closed cell foam sheets for packaging, lining, sealing, protection, fabrication and specialist projects. Compare Closed Cell AFP30 and Closed Cell AFP45 cross-linked polyethylene foam by density, rigidity, colour, thickness and intended use, with live prices shown before you add to basket.

Polyethylene foam Compare grades Choosing guide Applications Guides FAQs
Closed cell foam range

Which Closed Cell Foam Sheet Is Right for Your Application?

The current All Foam online closed-cell range focuses on two cross-linked polyethylene grades. Choose AFP30 for a lighter general-purpose sheet or AFP45 when the application needs greater density, rigidity and load-bearing support.

Cross-linked PE foam Closed Cell AFP30 and AFP45 foam sheets Rigid closed-cell sheets for packing, lining, sealing and industrial protection.
Need closed cell foam cut to size, foam blocks or a non-standard format? The products below are priced online as full sheets. Send the grade, finished dimensions, quantity and intended application through the contact page for cut-to-size, block, profile or other commercial requirements. For larger or repeat orders, see our Trade & Wholesale Foam page.
Rigid closed-cell polyethylene foam

Closed Cell AFP30 and AFP45 Foam Sheets

Quick answer

Choose Closed Cell AFP30 when you need a lightweight 30 kg/m³ cross-linked polyethylene foam sheet for general lining, packing or sealing. Choose Closed Cell AFP45 when the same type of project needs a denser 45 kg/m³ grade with greater load-bearing performance.

Closed Cell AFP45 is not automatically the better option. Use its additional rigidity only where the load, insert design or finished assembly requires it. Both Closed Cell AFP30 and AFP45 are available from 3mm to 100mm.

Closed Cell Polyethylene Foam Not Fire Retardant

Closed Cell AFP30 Foam Sheet

Data sheet

Closed Cell AFP30 is a rigid cross-linked polyethylene foam with a nominal density of 30 kg/m³. Supplied in black or white, its waterproof, non-absorbent structure makes it a practical choice for protective packaging, case lining, seals, insulation and other applications that need a lightweight, stable PE foam sheet.

Best suited to: Protective packaging, case lining, separators, sealing and water-resistant industrial uses that need a lightweight rigid polyethylene foam.

Available sheet sizes: 100cm × 100cm, 200cm × 100cm.

Key details

  • Cross-linked closed-cell polyethylene foam
  • Nominal density 30 kg/m³
  • Waterproof and non-absorbent structure
  • Black or white colour options
  • WRAS approved for cold water use

Online options

  • 100cm × 100cm or 200cm × 100cm sheets
  • Thicknesses from 3mm to 100mm
  • Not offered as a fire-retardant grade
  • Available in a wide range of thicknesses
  • For fire retardant options, please contact us
View all sizes and prices 20 prices

The table lists every size, thickness and price-affecting option with the exact standard unit price.

Sheet size Thickness Price
100cm × 100cm 3mm £11.78
100cm × 100cm 5mm £13.99
100cm × 100cm 10mm £19.99
100cm × 100cm 15mm £25.98
100cm × 100cm 20mm £31.98
100cm × 100cm 25mm £39.98
100cm × 100cm 30mm £45.98
100cm × 100cm 40mm £57.98
100cm × 100cm 50mm £69.98
100cm × 100cm 100mm £129.98
200cm × 100cm 3mm £14.99
200cm × 100cm 5mm £19.99
200cm × 100cm 10mm £31.98
200cm × 100cm 15mm £45.98
200cm × 100cm 20mm £57.98
200cm × 100cm 25mm £69.98
200cm × 100cm 30mm £81.98
200cm × 100cm 40mm £105.98
200cm × 100cm 50mm £129.98
200cm × 100cm 100mm £236.98

Colour does not change the price. The prices above apply to: Black, White.

Quantity pricing is calculated automatically for this range. A 5% foam-sheet quantity discount is included when the calculated line value reaches £150 or more.

Spend £170 or more in one qualifying order and receive an additional 10% off at checkout.

Black AFP30 closed cell polyethylene foam sheet
Price £11.78

10% off orders £170+

Higher Density Polyethylene Foam Not Fire Retardant

Closed Cell AFP45 Foam Sheet

Data sheet

Closed Cell AFP45 is a higher-density cross-linked polyethylene foam with a nominal density of 45 kg/m³. It provides greater load-bearing support than Closed Cell AFP30 and is suited to heavier protective inserts, industrial packing, structural gaskets, seals and demanding lining applications.

Best suited to: Heavier protective packaging, firmer case inserts, structural gaskets, seals and industrial lining where AFP30 does not provide enough rigidity.

Available sheet sizes: 100cm × 100cm, 200cm × 100cm.

Key details

  • Cross-linked closed-cell polyethylene foam
  • Nominal density 45 kg/m³
  • Higher load-bearing capacity than AFP30
  • Black foam colour
  • Water absorption specified at no more than 1% by volume

Online options

  • 100cm × 100cm or 200cm × 100cm sheets
  • Thicknesses from 3mm to 100mm
  • Not offered as a fire-retardant grade
  • Available in thicknesses from 3mm to 100mm
  • For fire-retardant options, please contact us
View all sizes and prices 20 prices

The table lists every size, thickness and price-affecting option with the exact standard unit price.

Sheet size Thickness Price
100cm × 100cm 3mm £11.99
100cm × 100cm 5mm £14.99
100cm × 100cm 10mm £21.98
100cm × 100cm 15mm £28.98
100cm × 100cm 20mm £34.98
100cm × 100cm 25mm £44.98
100cm × 100cm 30mm £50.98
100cm × 100cm 40mm £64.98
100cm × 100cm 50mm £78.98
100cm × 100cm 100mm £146.98
200cm × 100cm 3mm £15.99
200cm × 100cm 5mm £21.98
200cm × 100cm 10mm £34.98
200cm × 100cm 15mm £50.98
200cm × 100cm 20mm £64.98
200cm × 100cm 25mm £78.98
200cm × 100cm 30mm £91.98
200cm × 100cm 40mm £119.98
200cm × 100cm 50mm £146.98
200cm × 100cm 100mm £268.98

Fixed product options: Colour: Black.

Quantity pricing is calculated automatically for this range. A 5% foam-sheet quantity discount is included when the calculated line value reaches £150 or more.

Spend £170 or more in one qualifying order and receive an additional 10% off at checkout.

Black AFP45 higher-density closed cell polyethylene foam sheet
Price £11.99

10% off orders £170+

Compare closed cell foam

Closed Cell AFP30 vs AFP45

This comparison is designed to answer the first buying question quickly. Confirm the exact dimensions, options and technical specification on the product card and data sheet before ordering.

Foam Material How it differs Online thickness Best starting point
Closed Cell AFP30 Cross-linked polyethylene 30 kg/m³ rigid PE, black or white, waterproof 3mm to 100mm General rigid lining, packing and sealing
Closed Cell AFP45 Cross-linked polyethylene 45 kg/m³ and more load bearing than AFP30 3mm to 100mm Heavier inserts and more demanding support
Practical buying guidance

How to Choose the Right Closed Cell Foam Sheet

Start with the job the foam must perform, then narrow the choice by rigidity, water exposure, appearance, thickness and fixing method. This avoids choosing by colour or density alone.

1. Define the main job

Decide whether the sheet needs to protect an item, line a case, create a seal, fill a gap, resist weather, support a load or form a visible finished insert. The required function should determine the material family.

2. Decide how rigid it should be

Closed Cell AFP30 and Closed Cell AFP45 are rigid cross-linked polyethylene grades. AFP30 is the lighter general-purpose option, while AFP45 provides greater density and resistance under load.

3. Check water and weather exposure

Do not rely on the generic phrase closed cell. Closed Cell AFP30 and Closed Cell AFP45 each have their own water-performance specification, so match the named grade to the actual environment and application.

4. Choose thickness from the finished space

A 3mm liner and a 50mm protective insert solve very different problems. Measure the usable space, required compression and clearances before selecting thickness. More foam is not automatically better if it prevents a case, panel or joint from fitting correctly.

5. Plan how the foam will be retained

Dry fit the foam first and decide whether the finished part will be close-fitted, mechanically retained or bonded separately. This is especially important for liners, seals and complex inserts that may need trimming or replacement.

6. Confirm technical or regulated requirements

Fire, water, transport, healthcare and safety-critical projects require the exact product specification. Use the All Foam technical data sheets and contact us where suitability must be confirmed.

Material explained

What Is Closed Cell Foam?

Closed cell foam contains cells that are more fully enclosed than the interconnected cells found in open-cell foam. The result is generally lower water absorption and a more stable sheet, but the material still varies widely by polymer and grade.

Closed cell polyethylene foam

Polyethylene foam, often called PE foam, is the main rigid closed-cell family on this page. Closed Cell AFP30 and Closed Cell AFP45 are cross-linked PE grades with different densities and load-bearing characteristics.

AFP30 and AFP45 are different grades

Both products are cross-linked polyethylene foam, but their densities and load-bearing characteristics differ. AFP30 is the lighter grade, while AFP45 is selected where greater rigidity and support are required.

Closed cell vs open cell foam

Open-cell foam allows more air movement through its structure and is commonly used for upholstery cushioning and acoustic absorption. Closed-cell foam is usually a better starting point for lining, sealing, lower water absorption and stable protective inserts. Read our open cell vs closed cell foam guide for a fuller comparison.

Water and outdoor exposure

Is Closed Cell Foam Waterproof or Weather Resistant?

The accurate answer depends on the exact material. This page separates the grades rather than applying one blanket claim to every closed-cell product.

Closed Cell AFP30

Closed Cell AFP30 is a waterproof, non-absorbent cross-linked polyethylene foam with a nominal density of 30 kg/m³. It is also WRAS approved for cold-water use. This makes AFP30 a strong choice for protective lining, packaging, sealing and suitable water-related applications, but drinking-water, marine and safety-critical projects should still be checked against the requirements of the complete installation.

Closed Cell AFP45

Closed Cell AFP45 is a denser 45 kg/m³ cross-linked polyethylene foam that provides greater load-bearing support than AFP30. Water absorption is specified at a maximum of 1% by volume, making AFP45 useful for demanding protective inserts, industrial lining, structural gaskets and suitable outdoor-related applications where a firmer closed-cell sheet is required.

Safety-critical flotation

Some polyethylene grades are used in buoyancy and marine applications, but a generic closed-cell sheet should never be assumed suitable for a life-saving or regulated flotation product. Contact All Foam with the exact standard and application before ordering for safety-critical use.

Fixing and installation

Installing Closed Cell Foam Sheets

The current online AFP30 and AFP45 sheets are supplied unbacked, so the fixing method can be selected separately for the substrate and finished application.

Dry fit before fixing

Check dimensions, clearances, orientation and any cut-outs before the foam is permanently retained. This is particularly useful for case liners, gaskets and shaped inserts.

Choose a suitable fixing method

Some applications hold the foam by close fit or mechanical retention, while others use a separately specified bonding system. Match the fixing method to the exact foam, substrate, temperature and service conditions.

Prepare the receiving surface

Where bonding is part of the finished design, make sure the receiving surface is clean, dry, stable and compatible with the chosen fixing system before installation.

Thickness and sizing

Choosing Closed Cell Foam Sheet Thickness

The online range runs from thin 3mm Closed Cell AFP sheets to 100mm polyethylene options. Thickness changes clearance, compression depth and stiffness, so it should be chosen from the finished assembly rather than by copying another project.

Thin sheets for liners and seals

Thin closed-cell sheets are often used as liners, separators, anti-rattle pads, surface protection and gaskets. Measure the available gap and required compression carefully, especially where a door, lid or panel must still close correctly.

Medium thickness for inserts and protection

Medium-depth sheets can provide more material around tools, equipment and case contents. The correct depth depends on item weight, contact area, impact risk and how much usable room is available inside the case or container.

Deep sections for gap filling and support

Thicker AFP options can suit gap filling and deeper protective components, but a large thickness does not compensate for choosing the wrong material. Check how much the foam can compress and whether the load is spread over enough area.

Need a non-standard size?

Online products are sold as full rectangular sheets. For closed cell foam cut to size, blocks, profiles, repeated production or non-standard dimensions, contact All Foam with the grade, finished dimensions, quantity and intended use.

Common applications

What Are Closed Cell Foam Sheets Used For?

Closed-cell foam is used across packaging, industrial protection, sealing, fabrication and specialist projects. The examples below show useful starting points, not universal specifications.

Protective packaging and case inserts

Closed Cell AFP30 and Closed Cell AFP45 can both suit protective packaging in different ways. Choose by item weight, required rigidity, appearance and repeated use. For a broader packaging comparison, see our Packaging Foam Sheets range.

Tool trays and workshop organisation

Closed Cell AFP30 and AFP45 can provide firm liners, separators and reusable case inserts. Choose AFP30 for a lighter structure or AFP45 where greater rigidity and load-bearing support are required.

Firm seals, spacers and separators

Closed Cell AFP30 or AFP45 can suit firm gasket stock, spacers and separators where the complete specification supports polyethylene. Choose the grade and thickness from the required compression, clearance and load rather than from the word “seal” alone.

Marine and water-exposed projects

Closed Cell AFP30 and Closed Cell AFP45 have low water uptake and can suit appropriate water-exposed uses. Confirm the intended environment, loading and any regulatory requirement rather than choosing from buoyancy or waterproof wording alone.

Props, displays and creative fabrication

For fabricated inserts and shaped protection, AFP30 offers a lightweight closed-cell structure while AFP45 provides greater rigidity. Test cutting and fabrication methods on an offcut before producing the final part.

Protective pads and anti-rattle spacers

Closed Cell AFP30 and AFP45 can be used for firm protective pads and anti-rattle spacers where rigid polyethylene is appropriate. Check the load, movement, required compression and surrounding materials before finalising the grade.

Important specification checks

Fire Performance and Sound Control

Two common mistakes are assuming that closed cell means fire retardant and treating a closed-cell sheet as a complete soundproofing product. Both depend on the exact material and finished construction.

Closed cell does not mean fire retardant

Cell structure and fire performance are separate properties. Closed Cell AFP30 and Closed Cell AFP45 are not offered as fire-retardant grades by All Foam. Where a project has a fire requirement, check the technical specification for the exact product and confirm the required classification before ordering.

Closed cell foam is not room soundproofing

Closed-cell sheets can be useful for sealing, vibration control or insulation within a designed assembly, but they are not a complete answer for sound transmission through walls, floors or ceilings. If the goal is reducing room reflections and reverberation, compare our Class 0 Acoustic Foam Sheets and standard acoustic foam range.

Use the technical data sheet

Density, compression, water behaviour, weather resistance and fire information should be checked on the exact grade. Browse the All Foam data sheet library or contact the team where a specification must be confirmed for a commercial or regulated project.

Trade and bulk supply

Trade Closed Cell Foam, Blocks and Repeat Orders

Businesses requiring closed cell foam in quantity can contact All Foam with the grade, dimensions, volume and intended application. Repeat production and non-standard requirements are reviewed individually rather than forcing every commercial project through a standard sheet order.

Planning a bulk or repeat order? Visit Trade & Wholesale Foam for commercial enquiries covering foam sheets, blocks, packaging materials and specialist foam. Include the material, thickness, finished dimensions, quantity and expected ordering pattern so the team can review the requirement efficiently.
Closed cell foam guides

Learn More About Closed Cell Foam

Compare AFP30 and AFP45 polyethylene foam, understand closed-cell construction and explore practical marine, case-insert, gasket and protective applications.

Helpful answers

Closed Cell Foam Sheet FAQs

Clear answers about AFP30 and AFP45 polyethylene foam, water resistance, packaging, fixing methods, sound control and fire requirements.

Ask the All Foam Team
What is closed cell foam?

Closed cell foam contains cells that are more fully sealed from one another than open cell foam. This generally gives the material lower water absorption and a more stable structure. The current All Foam online closed-cell sheet range consists of AFP30 and AFP45 cross-linked polyethylene foam.

What is polyethylene foam or PE foam?

Polyethylene foam, often shortened to PE foam, is a closed-cell foam made from polyethylene. All Foam currently supplies Closed Cell AFP30 and Closed Cell AFP45 cross-linked polyethylene foam sheets online.

Is closed cell foam waterproof?

Water behaviour depends on the exact grade. Closed Cell AFP30 is described as waterproof and non-absorbent, while Closed Cell AFP45 has maximum water absorption of 1% by volume. Compare the exact product specification rather than assuming every closed-cell foam behaves in the same way.

What is the difference between Closed Cell AFP30 and Closed Cell AFP45 foam?

Closed Cell AFP30 has a nominal density of 30 kg/m³ and is the lighter general-purpose cross-linked polyethylene grade. Closed Cell AFP45 has a nominal density of 45 kg/m³ and greater compression resistance, so it is selected when the application needs more rigid load-bearing support. Both are available in 3mm to 100mm thicknesses.

How should closed cell foam sheets be fixed in place?

The current online Closed Cell AFP30 and AFP45 sheets are supplied unbacked. Depending on the application, the foam can be close-fitted, mechanically retained or bonded using a separately selected compatible fixing system.

Can I order closed cell foam cut to size?

The products on this page are priced online as full sheets. If you need closed cell foam cut to size, foam blocks, profiles or non-standard dimensions, contact All Foam with the grade, finished dimensions, quantity and application so the requirement can be reviewed.

Is closed cell foam suitable for packaging inserts?

Yes, suitable closed-cell polyethylene grades are widely used for reusable case inserts, liners, separators and protective packaging. Closed Cell AFP30 is a good starting point for lightweight rigid protection, while Closed Cell AFP45 offers greater rigidity and support. The correct thickness still depends on item weight, geometry and journey conditions.

Is closed cell foam good for soundproofing?

Closed cell foam should not be treated as a complete room soundproofing solution. Closed-cell materials can be useful for sealing, vibration control or insulation within a wider assembly, but open-cell acoustic foam is the better All Foam product family for reducing reflections, echo and reverberation inside a room or enclosure.

Is all closed cell foam fire retardant?

No. Closed cell describes the cell structure, not fire performance. Closed Cell AFP30 and Closed Cell AFP45 are not offered as fire-retardant grades by All Foam. Where an application has a fire requirement, check the technical specification and contact All Foam if a specific classification is required.