RTV is short for "room temperature vulcanizing." Generally there are 2 primary forms of RTV sealants: acrylic and silicon. Acrylic sealants can be found in adhesive forms. RTV sealants are widely-used in many different industrial sectors, from motor vehicle to electronic devices. In the automotive industry, RTV sealants are used to bond parts where high temperatures are not a factor. In the electronic industry, RTV sealants are use to seal off wires and to keep parts to each other. Visit http://www.ask.com/wiki/Room-temperature_vulcanization?qsrc=3044 for more information about RTV sealants.