Universal 1 oz. R-134a Total Leak Stop with U/V Dye & "HFC Free" Applicator by Supercool®. With U/V Dye & "HFC Free" Applicator. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Supercool® will last a lifetime. It will meet your needs and deliver great quality at an affordable cost.