Proseal and Prodry with Leak Detector for R12 Automotive Systems 6 Cans 2103-R12 Description Enviro-Safe Proseal and Prodry with Leak Detector finds and repairs minor leaks in mobile R12 a/c systems. It seals leaks in evaporators, condensers, fittings and metal lines. The ProDry contains a dehydrating agent that converts system moisture into oil. Moisture is corrosive and no one wants that in their system! Our highly concentrated, fluorescent yellow dye and allows the dye to be highly visible, and in most cases, able to be seen with the naked eye. However, the use of a blacklight as well as UV glasses does make it much more visible. Before replacing expensive parts and labor, try Enviro-Safe Proseal with Prodry and Leak Detector! Works on most mobile R12 applications. Applications: automotive, campers, semi trac (description exceeds maximum possible length)