Silicone Foam Closed Cell 2

Silicone Foam Closed Cell 2 is a two-component (platinum) polyaddition casting silicone that cures at room temperature and expands to up to twice its original volume. This silicone can, of course, also be coloured with silicone dye.

It is used for filling seat cushions, for props and scenery, and for filling flexible objects such as bras, cushions and mattresses. Foam sheets and foam mats are also made with this silicone. Silicone foam is also well suited to sealing electronics and lithium batteries (testing for your application is essential).

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

Technical data

• Mix ratio by weight: A:B = 100:100
• Working time (pot life) at 25 °C: 9 minutes
• Demoulding time at 25 °C: 4 hours
• Viscosity at 20 °C: 4,000 mPa·s
• Colour: whitish, colourless
• Hardness: Shore C 12, depending on expansion
• Density at 20 °C: 0.54 g/cm³
• Expansion factor (volume): 2
• Closed cells

Please note: pot life and demoulding time depend heavily 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 obtain the properties described.

Processing

This silicone can easily be mixed by hand or by machine. Mix Part A and Part B thoroughly in the stated ratio (100 parts A to 100 parts B by weight). Use the mixture within the pot life and do not demould until it has fully cured. If required, you can speed up 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 starts to collapse again.
Ideally, therefore, process the silicone at room temperature.

Working in a closed mould produces a more uniform foam.

Additional information

You can colour the silicone intensely with silicone dye.

Please note: this is an addition-cure silicone. These silicones can be inhibited (poisoned) 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 sealant, natural rubber and 3D printing materials (especially stereolithography). If you still wish to use such materials, you will need to apply a protective layer of polyvinyl alcohol.

Shelf life

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

Safety

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

Product information

EN - Product information Silicone foam Closed Cell 2.pdf