RTV is an acronym for Room Temperature Vulcanizing. It can be applied to any sealant that cures by itself, i.e., without adding a catalyst or using heat. This does not mean that you can use any product that is an RTV sealant. Using bathroom caulk from Home Depot is not a good idea, to say the least.

Permatex makes several different varieties of RTV products, as well as other glue type sealants. Use a product that is intended for use in your specific application.

RTH