Closed Cell Foam Sheets UK

Closed cell foam contains cells that are more fully sealed from one another than open cell foam. This usually gives the material lower water absorption and a more stable structure. Closed cell is a material category rather than one fixed specification, so AFP polyethylene, Plastazote and EPDM still need to be compared by grade, rigidity, thickness and intended use.

Polyethylene foam, often shortened to PE foam, is a closed-cell foam made from polyethylene. The All Foam closed-cell range includes Closed Cell AFP30 and Closed Cell AFP45 cross-linked polyethylene foam, plus nitrogen-expanded cross-linked Plastazote LD33. EPDM is a separate closed-cell synthetic rubber option for flexible sealing and weather-resistant applications.

Water behaviour depends on the exact grade. Closed Cell AFP30 is waterproof and non-absorbent, Closed Cell AFP45 has maximum water absorption of 1% by volume, Plastazote LD33 has negligible water absorption and EPDM is intended for weather-resistant sealing applications. Compare the exact product specification rather than assuming every closed-cell foam behaves in the same way.

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 2mm to 100mm thicknesses with optional self-adhesive backing.

Plastazote LD33 is useful where a clean finish, colour choice and workability matter as well as a closed-cell structure. Typical applications include presentation packaging, reusable case inserts, shadow boards, props, displays and specialist fabrication. All Foam offers nine colours and thicknesses from 3mm to 50mm.

EPDM is a flexible closed-cell synthetic rubber rather than a rigid polyethylene foam. It is commonly selected for gaskets, door seals, weather strips, anti-rattle pads, cushioning and anti-vibration applications where flexibility and resistance to UV, ozone and weathering are useful.

Closed Cell AFP30, Closed Cell AFP45, Plastazote LD33 and EPDM can be ordered with or without self-adhesive backing from All Foam. Adhesive backing should only be applied to a clean, dry and suitable surface.

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.

Yes, suitable closed-cell 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, Closed Cell AFP45 offers more support and Plastazote suits presentation and detailed fabrication. The correct thickness still depends on item weight, geometry and journey conditions.

Closed cell foam should not be treated as a complete room soundproofing solution. Some 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.

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. For Plastazote, EPDM or any application with a fire requirement, check the technical specification for the exact product and contact All Foam if a specific classification is required.