Enviro-Safe Proseal VS with Dye 1234YF is specifically designed to seal condensor, evaporator, o’ring and schrader valve leaks in R1234YF systems by using our time tested sealant.
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.
Unlike other other products that only last a year, our specially formulated Proseal VS will continue to protect your systems for years to come.