Permatex's ultra red offers high-temperature-resistant available today. Ultra red is a high-performance low odor formulation, outperforming the previous gen. Red RTV. Ultra red resists temperatures up to 650 deg F (343 deg C). This high-temperature gasket maker is resistant to high-thermal cycling and is sensor safe, non-corrosive RTV. This chemical gasket maker can be used in replacement of pre-cut gaskets and is ideal for high-temperature applications such as the exhaust manifold, header, turbochargers and slip-fit exhaust parts.