New Permatex Gasket Maker. This is Ultra Copper, and is a maxium temperature sealer. This is sensor safe, and works for applications from 65 deg F to 700 Deg F. We typically use Copper sealer for sealing exhaust flanges.
TIPS : Not all gasket sealers are the same. The color of the sealer is typically for a specific fluid or application, although some are multipurpose. Using the right sealer works properly, using the wrong sealer may cause premature leaks.