Gap Filling & Sealing

PU Foam — Micro-Cellular Polyurethane Pads

Soft, compressible micro-cellular polyurethane foam engineered for gasket sealing, cushioning, vibration damping and gap filling — in electronics, battery packs, and enclosed assemblies.

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High compress & recovery Flame-retardant options Die-cut to shape

Soft & sealingCushions & conforms

What it is

Micro-cellular foam that compresses, seals and recovers.

Micro-cellular polyurethane (PU) foam is a soft, evenly celled material that compresses under load and recovers its shape when the load is released. Its fine cell structure lets it conform to uneven surfaces, filling gaps and forming a reliable seal or cushion between mating parts.

Supplied as sheets and custom die-cut pads, it is widely used where parts need protection from shock, vibration, dust or moisture ingress inside compact enclosures.

Why engineers choose it

Conforms, cushions and seals in tight spaces.

Excellent compressibility and shape recovery
Conforms to uneven surfaces for effective sealing
Absorbs shock and damps vibration
Fills gaps and tolerances between mating parts
Flame-retardant options available

What It Does

Four jobs, one material

Micro-cellular PU foam earns its place across sealing, cushioning, damping and gap-filling duties.

Gasket sealing

Conforms to mating surfaces to form dust and moisture seals around enclosure lids, doors and access panels.

Cushioning

Soft, recoverable padding that protects delicate components and cells from shock and impact inside assemblies.

Vibration damping

Compressible foam that isolates and dampens vibration and micro-motion between parts in moving or noisy environments.

Gap filling

Fills uneven gaps and tolerances between components, taking up stack-up variation and preventing rattle or movement inside packed enclosures.

Typical Applications

Where PU foam is used

Wherever a soft, sealing, cushioning interface is needed inside an assembly.

Battery & BMS packs

Electronics enclosures

LED drivers & SMPS

EV charger housings

Gaskets & lid seals

Shock & rattle padding

Formats & Supply

Configured to your dimensions

Sheets and die-cut pads to your size, thickness and quantity. Tell us what you need and we’ll confirm the right grade and quote.

Custom die-cut shapes

Die-cut pads and gaskets converted to your drawing, with consistent dimensions across repeat production runs.

Sheets & thicknesses

Sheet supply in your required thickness and size, with density and grade confirmed against your application.

Flame-retardant options

Flame-retardant grades available where enclosure or battery-pack requirements call for them — confirm on request.

Exact density, hardness and thickness ranges depend on the selected grade and application. Share your requirements and we’ll confirm the right material and send the matching datasheet.

Ready to specify your PU foam pads or sheets?

Share the thickness, density, size, shape and quantity — or send your drawing. We’ll confirm the right grade and quote it.

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Request a Quote

Tell us your PU foam requirement

Thickness, density, size, shape and quantity — or attach your drawing. We’ll confirm the right grade and pricing.