Mastercool 91049-128-4 A/C Flush Solvent, 4-Pack 1 Gallon — Professional Automotive & HVAC/R System Flush — Solvent-Based, Fast-Evaporating, Leaves No Residue, Non-Flammable, Made in USA

OverviewMastercool A/C Flush Solvent is a professional-use solution designed to clean and flush automotive A/C systems. It helps remove debris and sludge from A/C components, supporting proper system performance before recharge or repair.Key FeaturesThe solvent-based formula evaporates quickly and leaves no residue, helping technicians perform efficient and clean service work. It is formulated to be O-ring safe and is designed for use on A/C system components. Multiple size and pack options allow technicians and shops to choose the right quantity based on service needs.Why MastercoolMastercool has been a trusted name in automotive A/C service tools and equipment for decades. This flush solvent reflects that commitment by delivering practical, technician-focused performance with consistent product quality. Manufactured in the USA, it provides a dependable solution for A/C system maintenance.Technical SpecificationsProduct Name: A/C Flush Solvent Brand: Mastercool Application: Automotive A/C system flushing Formula Type: Solvent-based Performance: Evaporates quickly; leaves no residue Material Compatibility: O-ring safe Country of Origin: USAAvailable Configurations: 91049-32 – 32 oz 91049-32-6 – 6 pack of 32 oz 91049-128 – 1 gallon 91049-128-4 – 4 pack of 1 gallon

• ✔️ PROFESSIONAL A/C SYSTEM FLUSH — AUTOMOTIVE & HVAC/R — Designed specifically for professional technicians to thoroughly clean A/C system components before recharge or repair. Effectively removes refrigerant oil, debris, and sludge from hoses, condensers, and evaporators. For professional use only. Do not flush compressors, expansion valves, orifice tubes, filter driers, or accumulators.
• ✔️ NON-FLAMMABLE & NON-CORROSIVE — SAFE FOR SHOP USE — Solvent-based formula is non-flammable and non-corrosive, making it safe for use in professional shop environments where ignition sources are present. Compatible with the Mastercool 91046-A A/C System Flush Kit — do not use with CFC-based or flammable flush solvents.
• ✔️ FAST-EVAPORATING — LEAVES NO RESIDUE — Evaporates quickly after flushing, leaving no residue behind to contaminate the freshly serviced system. Helps ensure a clean internal system path before recharge, reducing the risk of compressor failure or system contamination after service.
• ✔️ O-RING SAFE FORMULATION — Formulated to be compatible with A/C system O-rings and seals, reducing the risk of seal damage during the flushing process. Suitable for use with R134a, R1234yf, R12, R22, and R410a systems.
• ✔️ MULTIPLE SIZE & PACK OPTIONS — RIGHT QUANTITY FOR ANY SHOP — Available in 32 oz. single, 6-pack of 32 oz., 1 gallon single, and 4-pack of 1 gallon — giving individual technicians and high-volume shops the flexibility to buy the right quantity for their service needs. Use with the Mastercool 91046-A A/C System Flush Kit hardware (sold separately).
• ✔️ DISPOSE PROPERLY — FOLLOW ALL APPLICABLE REGULATIONS — After flushing, dispose of used flush solvent, oil, and debris in accordance with local, state, and federal environmental regulations. After completion, flush material must be disposed of in accordance with State, Local and Federal Laws regarding chemical disposal.
• ✔️ MADE IN USA BY MASTERCOOL — OVER 40 YEARS OF PROFESSIONAL QUALITY — Manufactured in the USA by Mastercool, a family-owned company that has been supplying professional A/C service tools and equipment to automotive and HVAC/R technicians for over 40 years. Backed by U.S.-based customer service and technical support.