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SIL15 FDA Sponge Strip

SIL15 FDA sponge strip is a medium density, mainly closed-cell silicone sponge available in white. This platinum cured material conforms to FDA 177.2600 and EC 1935/2004 standards. 

Commonly used in gasket and sealing applications, particularly in the food processing industry due to its FDA conformity, this product is also popular in electronics, automotive, HVAC, lighting and marine industries to name a few.


We can produce this product in almost any size or colour. If you can't find what you're looking for enquire now

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Details & Specs


Performs at temperatures from -40°C to +200°C. 

The material should not be compressed by more than 50% of its original thickness, as the cells may break under such compression.

The maximum compression recommended is 30% of initial thickness. Sealing with less than 30% compression helps reduce compression set and promotes product longevity.

Our SIL20 FDA range is in compliant with the American Food and Drugs Administration (FDA) 21 CFR 177-2600 & 175.300 it is also compliant to German BfR Recommendation XV on silicone Food Contact.

EU1935/2004 compliant.

These products meet the flammability requirements of FAR 25/J AR 25/ CS25 Appendix F, Part 1, (a)(1)(v) horizontal flammability test and Automotive Standard PART 571FMVSS302.

Can be formulated to meet AMS and ASTM sponge specifications.

The sponge is a predominantly closed cell with low water absorption and dust ingress protection up to IP65.


PropertyTest MethodResult
Density *BSENISO 845 

ASTM D3574

420 [kg/m³]

26 [lb/ft³]

Hardness **ASTM D224060±5 [Shore OO]

15 [Shore A]

Compression Stress 40% Strain ***BSENISO 3386 part 1, 290 [kPa]

13 [PSI]

Tensile StrengthBSENISO 1798 


0.9 [MPa]

131 [PSI]

Elongation to FailureBSENISO 1798


590 [%]
Compression Set – 22 hrs at 70°C (158°F) ****BSENISO 18563.5 [%]
Compression Set – 22hs at 100°C (212°F)ASTM D10564.0 [%]


*Density measured on a 25mm diameter cord sample. The density of samples of different sizes will be different from that stated here. 

**Hardness measured on 10mm thick samples. At less than 10mm the measured hardness will increase with density. 

***Compression Stress measured on samples as defined by BSENISO 3386. The compressive stress on samples of different dimensions, especially thickness, may vary from that quoted here. For further information about physical properties for other sample sizes, please contact the technical department.

**** 50% compression, 24 hours recovery


It is not possible to perform a Shore A hardness test on sponge material. These values are provided as a guideline for comparison to solid materials and as such are not designed for use in specifications. For further information about physical properties of other sample sizes, please contact the technical department.


Chemical Resistance

Availability and Fabrication Possibility

  • any food contact application
  • BFR XV “Silicones”, and FDA 177.2600 compliant
  • PSA options available (including PSA FDA Options, please enquire)
  • can be punched or waterjet cut into gaskets and seals
  • other extrusions possible, enquire for sponge tube or check SIL15FDA cord options
  • because of its mixed cell nature able to meet IP Classes

Can we help you?

If you’d like to discuss your idea, requirements or application with a member of our technical team, fill out the form below or contact us.
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