Is Sylcap 284 as permeable as Sylgard 184?

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I just need a permeable PDMS material. Sylgard comes in MOQ 0.5kg, while Sylcap is MOQ 100g which is better, I just need to know if it will work the same.
 
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Ask the manufacturer(s).
 
Sylcap is reported to cure faster than Sylgard l, so that’s a difference.
 

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