Johnsen’s Ester Lubricants With UV Dye, 1Quart. A premium synthetic polyol ester (POE) lubricant formulated with a proprietary additive package and SAE-approved UV dye for fast and efficient A/C leak detection. Its unique chemistry allows it to be used in R-12 or R-134a A/C systems. Robert at MB PICASO BODY SHOP is the reason we offer this product to everyone since he requested this item to be included in our inventory, If you are in need of body work or mechanical work in around 3rd street in Los Angles, give him a visit, a nice and sincere friend to have. 6710UV