1. :Wood is also a much better thermal insulator than concrete or brick. 2. The outer vessel is evacuated with the vacuum acting as a thermal insulator . 3. Asbestos is a mineral that was popular as a thermal insulator . 4. Plastics are very good thermal insulators and are therefore difficult to cool quickly. 5. Crust can form on the corium mass, acting as a thermal insulator and hindering thermal losses. 6. Wood also has the property of being a good thermal insulator ( as is plastic ). 7. In addition to this he also made extensive researches on thermal insulators and technology of glazed tile manufacture. 8. It does not retain water, is a thermal insulator even when wet and can resist solar radiation effectively. 9. In central Africa, thermal insulator . 10. :: Perhaps your friends were confusing aluminum foil with mylar foil, which IS used effevtively as a thermal insulator .
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