What disolves RTV?

Background info: I've been asked to change the windows in the Peacekeeper Armored Vehicles owned by the US Marshalls Special Ops Group (BIG guys, well armed) and the method I've been told to use sounds iffy at best. Is there is a chemical that readily disolves or softens RTV (Silicone, Acrylic, Urethane)

Odd question I know.

Collins