Silicone Foam Open Cell 6

Silicone Foam Open Cell 6 is a two-component, addition-cure (platinum) casting silicone that cures at room temperature and expands to up to 6 times its volume. This silicone can of course also be pigmented with silicone dye.

It is used to fill seat cushions, for props and set design, and to fill flexible objects such as bras. It is also used to make foam sheets and foam mats. Silicone foam is also well suited to sealing lithium batteries (application testing is essential).

• High expansion
• Recovers well to its intended shape after compression
• High temperature and chemical resistance
• Easy to process
• Uniform, evenly distributed density throughout the casting.

Technical data

• Mix ratio by weight: A:B = 100:100
• Working time (pot life) at 25°C: 2 minutes
• Demoulding time at 25°C: 2 hours
• Viscosity at 20°C: 8,000 mPa·s
• Colour: whitish, colourless
• Hardness: Shore C 4 (Shore A 20), depending on expansion
• Density at 20°C: 0.193 g/cm³
• Expansion factor (volume): 6
• Open-cell

Please note: pot life and demoulding time depend strongly on temperature! At higher temperatures, the working time and demoulding time become shorter. The expansion factor is also highly temperature-dependent. Process the product at the stated temperature to achieve the properties described.

Processing

This silicone can easily be mixed by hand or by machine. Mix the A and B components thoroughly in the stated ratio (100 parts A to 100 parts B by weight). Process the mixture within the pot life and wait until it has fully cured before demoulding. If required, you can accelerate curing by applying heat. Every 10 degrees roughly halves the time. Bear in mind that air bubbles then have less time to escape.

Please note: the faster the silicone cures, the weaker the foaming effect. At higher temperatures the silicone cures faster, so the foam cannot develop fully. Silicone that is too cold also gives a poorer result, because the foam then starts to collapse again.
It is therefore best to process the silicone at room temperature.

Working in a closed mould produces a more uniform foam mass.

Additional information

You can pigment the silicone intensely with silicone dye.

Please note: this is an addition-cure silicone. Addition-cure silicones can be inhibited by sulphur, nitrogen, amine compounds and metal salts. If you are not sure whether the products you are using (including gloves, spatulas and cups) contain these substances, carry out a small test first. These substances are found in, among other things, many latex gloves, some plasticines, lacquers and adhesives, condensation-cure silicones, one-component silicone sealants, natural rubbers and 3D printing materials (especially stereolithography). If you still want to use them, you will need to apply a protective layer of polyvinyl alcohol.

Shelf life

When stored in closed packaging in a cool, frost-free place, the silicone has a shelf life of at least one year.

Safety requirements

If you work with silicone frequently, we recommend wearing gloves during processing and ventilating the room well. For safety instructions, please refer to the safety data sheet.

Product information

EN - Product information Silicone foam Open Cell 6.pdf