For 1990-2009 cars

RTV (Room Temperature Vulcanizing) sealants are used in various applications on engines produced by General Motors. Several factors need to be considered when servicing this material such as:

• | Shelf Life - The useful shelf life of RTV products is approximately one year. Product used beyond this period will not perform as designed in some cases.

• | RTV Instead of a gasket - RTV has limitations as far as its performance under specific operating conditions. For this reason the use of RTV in an application where a gasket was originally used should not be attempted.

• | Color - RTV can be any color. High temperature resistant compounds are more likely to be red in color due to the addition of iron oxide. Other colors, are not indicative of any brand or physical characteristics.

• | Several different RTV compounds are available which differ slightly in performance characteristics. General Motors has specific recommendations for all applications of RTV sealants. Equivalent products may be used if the recommended material is not available.