If I remember correctly, it's made of silicone elastomer with small hollow silica particles inside 
Have you heard of Prosial? Some of you are real experts, so we expect you to post a reply with information about this incredible material. #ArianeGrouppic.twitter.com/u9Q6oQT7OC
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Prosial is a silicone based sprayable ablative thermal protection material, rated to I believe 1000 degrees Celsius. Can be applied in confined and tight spaces and can be coated afterwards. It is what protected the Huygens probe during entry to Titan’s atmosphere!
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Thanks for your support Nicole!
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