Heat insulators retain heat in what they are placed upon. The most efficient way to fix a hot firewall, interior, or fuel cell is to stop heat at the source with an insulator to protect car from heat. Most insulators are exhaust wraps, but there are other options. Typical insulators (wraps) available on the market are comprised of fiberglass, which is good for 1000F of continuous direct heat. Fiberglass exhaust wraps can have special coatings applied to them such as “Vermiculite,” graphite, etc., which allow the fiberglass to take 1200F of continuous direct contact. Heatshield Products has even developed a proprietary HPTC coating which allows the glass to sustain 1350F of continuous heat. In addition, the wrap will remain flexible, strong, and abrasion-resistant even at those temperatures to provide car heat protection.
Be cautious of any fiberglass wrap advertising or labeled as 2000F as this number is the maximum temperature a fiberglass exhaust heat wrap can withstand for less than 30 seconds. Anything above 2000F for an extended period of time will cook fiberglass exhaust wrap, causing it to get brittle and fall apart. That is because it exceeded the 1200F degree continual operating temperature, and the chemical make-up has actually changed and crystallized.
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