Mastercool 53909 Mini Auto A/C Master Leak Shield Dye Injector – Cartridge-Type 1 oz Injector with Sealant and UV Dye, Low Side Hose, and R12 Adapter – R134a Compatible

Mastercool 53909 Mini Auto A/C Master Leak Shield Dye Injector The Mastercool 53909 is a cartridge-type 1 oz injector pre-filled with Auto A/C Master Leak Shield — a blend of sealant and high-quality universal UV dye. This tool is designed to both seal minor A/C leaks and highlight larger ones for fast diagnosis. Kit Includes: - Cartridge-Type 1 oz Injector with Sealant and UV Dye - Low Side Hose - R12 Adapter Features: ✔️ Seals small system leaks and detects larger ones with UV dye ✔️ Safe for hybrid and electric compressors ✔️ Compatible with R134a A/C systems ✔️ Independently tested by Intertek – no system damage or restriction Compact, effective, and trusted by professionals — backed by Mastercool’s U.S.-based support team.

• ✔️ “Cartridge Type” Injector with Sealant and Dye – Pre-filled 1 oz cartridge contains Auto A/C Master Leak Shield with UV fluorescent dye for fast leak sealing and detection.
• ✔️ Seals & Detects Leaks – Seals small leaks in A/C system components (evaporators, condensers, o-rings, gaskets) while UV dye illuminates larger leaks under a UV light.
• ✔️ Includes Low Side Hose and R12 Adapter – Designed for R134a systems; easy to connect with included accessories for fast injection.
• ✔️ Hybrid and Electric Compressor Safe – Independently tested by Intertek: no damage, no restriction to A/C systems.
• ✔️ Disposable and Technician-Ready – Compact, clean, and perfect for mobile or in-shop preventative maintenance.
• ✔️ Mastercool Quality – Backed by over 40 years of professional A/C tool experience and U.S.-based customer support.