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I'm pretty sure they're not the same thing. Space blankets come pre-folded and those folds break the micro thin layer of aluminum (shine a light through one to see). The sandwich of mylar (a non-conductive material) and micro thin aluminum and then another layer of mylar is the technology behind space blankets. If you can eliminate the conductive properties of aluminum and use its heat reflecting properties at the same time you're in business. But space blankets suffer a death of a thousands cuts .... or folds as it would be.
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