TSI Supercool PB32 PAG Blue 32-Ounce - Case of 6 is an advanced performance synthetic PAG for aftermarket A/C systems using R134a refrigerant. It provides excellent resistance to moisture. It contains conditioners, inhibitors and anti-wear agents. This lubricant is designed to provide excellent lubricity and compressor protection. Supercool customers receive industry's leading technology in all fluids with lubricants and UV dye's formulated to meet or exceed OEM performance specifications. In addition, all lubricants are top-off compatible with their corresponding OEM and aftermarket equivalents. Designed for real-world operating conditions, they provide an unsurpassed level of service, performance, protection, and fluid life.