Polyurethane Foam

Polyurethane casting foam (2-Component PU Foam) Professional polyurethane foam (also: PU foam / PUR foam ) for hand mixing and pouring . Choose between low density for lightweight filling or higher density for comfort and support. Ideal for filling cavities , making seat cushions , and creating props/models . ⚠️...
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  • Last stock! Altropol Polyurethaan schuim flexibel 50 vloeibaar

    AltropolPolyurethane foam flexible 50 liquid

    In stock

    €35,14€29,04

    PLEASE NOTE: since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required courses. Companies can register for online training via THIS link. You can also read more information here....

  • Last stock! Altropol Polyurethaan schuim flexibel 280 vloeibaar

    AltropolPolyurethane foam flexible 280 Liquid

    In stock

    €44,64€36,89

    PLEASE NOTE: Since August 2023, polyurethane with a diisocyanate content of more than 0.1% may only be used in companies where employees have completed the required training courses. Companies can register for an online training via THIS link. You can...

Polyurethane casting foam (2-Component PU Foam)

Professional polyurethane foam (also: PU foam / PUR foam ) for hand mixing and pouring . Choose between low density for lightweight filling or higher density for comfort and support. Ideal for filling cavities , making seat cushions , and creating props/models .

⚠️ Note (diisocyanates & training): Since August 2023, polyurethane with a diisocyanate content > 0.1% may only be processed by companies whose employees have completed the required training. Ensure you have the correct training/certification before starting, in accordance with EU regulations.

Why choose castable PU foam?

  • Easy processing: 2-component, manual mixing and pouring into mould or cavity.
  • Control over expansion & density: from light ( low density ) to comfort ( higher density ).
  • Fills large volumes: perfect for large cavities and molded parts.
  • Professional quality: consistent cell structure and reliable results.

Applications: filling cavities, cushions & creative shapes

Insulation & construction

  • Fill local cavities and shape parts for thermal/acoustic functions.

Furniture & comfort

  • Furniture foam (PU): seat cushions , pads and comfort elements.

Industry

  • Light but strong fillings in constructions and housings.

Creative & SFX

  • Props, cosplay & model making – form-free casting with flexible skin.

Choose the right density: low vs. higher

Density Properties Typical deployment
Low density Very light, high expansion, damping Filling voids, light props, model core
Higher density More support/comfort, firmer skin Seat cushions, furniture components, sustainable props

💡 Tip: Pour in one continuous stream; avoid air pockets by "wetting" the edges and corners. Work within the specified pot life.

Range of flexible polyurethane casting foam

PU Foam Flexible 50 – low density (liquid, pourable)

Flexible, low-density , high-expansion polyurethane casting foam . Mix by hand and pour into unheated cavities or molds .

  • Ideal for: lightweight stuffing, props, model making.
  • Properties: expanding PU foam (liquid), flexible cell structure.
  • Use: mix 2-components precisely; pour in a thin stream.

PU Foam Flexible 280 – higher density (liquid, pourable)

Flexible, high-density PU foam for seat cushions , furniture applications, and durable props . Suitable for hand mixing and pouring.

  • Ideal for: comfort, support and shape retention.
  • Features: controlled expansion, consistent cell image.
  • Use: Pour into cavities/molds; allow to foam and harden undisturbed.

2-Component: Manual mixing & pouring with control

  • Preparation : Components at operating temperature; mold/cavity clean and dry.
  • Mixing: weigh exactly according to TDS; mix quickly and homogeneously (including the edges/bottom).
  • Pouring : in one continuous stream; respect pot life and fill level due to expansion.
  • Post-treatment: allow to harden completely; do not process or coat until fully hardened.
  • Safety: Wear PPE and work ventilated; follow TDS/SDS and training requirements.

Frequently Asked Questions – Polyurethane Casting Foam (PU/PUR)

What is the difference between 2-component PU foam and 1K PU foam?

Two-component PU foam is pourable , reacts with the mixing of A and B, and provides controlled expansion and density. One-component PU foam (in a gun can) reacts with moisture and is intended for sealing/assembly – not for pouring applications.

Can I pour into molds?

Yes. Use a suitable mold (not heated), apply release agent if necessary, and pour in a thin stream. Allow for expansion space.

What density should I choose for seat cushions?

Choose a higher density (such as Flexible 280) for comfort, support, and durability; lower density (Flexible 50) is better for lightweight padding.

Advice & order

Are you unsure whether to choose a low or high density , or want to know which expansion option is best for your project? We're happy to help you with selection, application, and dosage.


Professional use only. Always consult the TDS/SDS. Comply with EU requirements for diisocyanates and maintain internal training certificates.

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