Soudal PU Foams

Open-cell PU Foam Technology

Why cell structure matters

PU foam needs the right balance of density, yield and strength. Foam that is too dense gives less volume and poorer insulation; foam that is too light may lack the stability the job requires.

Soudal has developed open-cell formulations and manufacturing controls to manage that balance across its PU foam range.

The aim is a stable foam with useful strength, efficient yield and a consistent cell structure.

An open-cell structure also supports controlled expansion, moisture curing and thermal and acoustic insulation.

Better insulation

Create a barrier to save energy

Gaps around windows, doors and service penetrations can undermine an otherwise well-insulated wall. Filling those irregular spaces helps maintain a more continuous insulation layer.

PU foam’s cellular structure makes it useful for reducing heat and air movement through suitable construction gaps.

That matters in Singapore as much as in a cold climate: reducing unwanted heat gain and conditioned-air leakage can ease the load on air-conditioning.

Filling open gaps can also reduce paths for sound. The result depends on the selected foam and the complete joint or frame design.

Choose the foam by its documented insulation values, expansion behaviour and the needs of the actual detail.

Superior dimensional stability

Filling joints, not bending them

Soudal PU foams combine their cell structure and controlled expansion to limit curing pressure and remain stable after application.

Foam with poor dimensional stability can keep expanding or create enough pressure to move a frame or lightweight profile. Correct dosing, temporary bracing and the right product all help prevent that.

Soudal foams are formulated for stable behaviour during and after curing, with controlled post-expansion so frames and profiles are not pushed out of shape. Follow the fill guidance for the selected foam and leave room for expansion rather than overfilling the cavity.

Storage and shelf life

Protect performance before use

PU foam performance depends on how the can is stored before use. Heat, age and damaged valves can affect the pressure, cell structure and usable yield.

Soudal formulates the contents and designs the can, valve and nozzle as one system to keep the product stable through its stated shelf life.

Store cans upright within the temperature range on the label, protect them from heat and use them before the marked expiry date.

Different application methods

Choose a straw or foam gun

Straw foams are convenient for small, immediate jobs because the applicator comes with the can. Gun-grade foams need a separate applicator and cleaner, but give finer control and are usually the better choice for repeated or larger work.

Made in Belgium

European production and quality control

Soudal manufactures PU foam in Europe using its own formulations and automated production lines. Raw-material, filling and finished-product checks help keep the foam consistent from can to can.