{"product_id":"mastercool-a-c-flush-solvent-32-oz-fast-evaporating-o-ring-safe-non-flammable-cleaner","title":"Mastercool A\/C Flush Solvent 32 oz — Fast-Evaporating, O-Ring Safe, Non-Flammable Cleaner","description":"\u003cp\u003e\u003cstrong\u003eMastercool 91049-32 is a professional solvent designed to flush refrigerant oil, sludge, and contaminants from automotive and HVAC\/R A\/C components quickly while leaving no residue.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 32 oz. solvent is formulated for technicians who need a dependable, fast-evaporating cleaner that is non-flammable and safe on common A\/C seals. Made in the USA by Mastercool, the product is compatible with modern and legacy refrigerants and is intended for use with appropriate flush hardware (Mastercool 91046-A sold separately). Follow all local, state and federal disposal rules after use.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this solvent help when preparing a system for service?\u003c\/h3\u003e\n\n\u003cp\u003eThe solvent dissolves and carries away refrigerant oil, varnish, and particulate contaminants from condensers, evaporators and hoses so fresh refrigerant and lubricants won’t be contaminated after recharge. It evaporates rapidly and is formulated to leave minimal to no residue, supporting cleaner recharges and minimizing carryover contamination.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRemoves oil, sludge, and debris from internal lines and heat exchangers\u003c\/li\u003e\n  \u003cli\u003eFast-evaporating formula helps reduce drying time before reassembly\u003c\/li\u003e\n  \u003cli\u003eLeaves no detectable residue when used as directed\u003c\/li\u003e\n  \u003cli\u003eCompatible with common refrigerants including R134a, R1234yf, R12, R22, and R410a\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs Mastercool 91049-32 safe to use around seals and shop equipment?\u003c\/h3\u003e\n\n\u003cp\u003eThe formula is non-corrosive and specifically blended to be O-ring safe so it reduces the risk of seal swelling or degradation during flushing. It is non-flammable, which is beneficial for professional shop environments where ignition sources may be present, but technicians should still follow general safety and ventilation best practices.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eO-ring and common seal compatibility to protect system components\u003c\/li\u003e\n  \u003cli\u003eNon-flammable and non-corrosive for safer shop handling\u003c\/li\u003e\n  \u003cli\u003eUse with approved flush hardware; avoid flushing certain components\u003c\/li\u003e\n  \u003cli\u003eNot recommended for compressors, expansion devices, filter driers, or accumulators\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich components and refrigerant systems is it appropriate for?\u003c\/h3\u003e\n\n\u003cp\u003eMastercool 91049-32 is intended for cleaning hoses, condensers, evaporators and other accessible lines in both automotive and HVAC\/R systems. It supports a wide range of refrigerants but should not be used to flush internal service-critical items such as compressors, orifice tubes, expansion valves, filter driers, or accumulators.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eEffective on systems using R134a, R1234yf, R12, R22, and R410a\u003c\/li\u003e\n  \u003cli\u003eDesigned for condensers, evaporators, hoses, and accessible piping\u003c\/li\u003e\n  \u003cli\u003eAvoid use on compressors, expansion valves, or accumulators per instructions\u003c\/li\u003e\n  \u003cli\u003eIntended for professional technician use with proper flush kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should used solvent be handled after flushing?\u003c\/h3\u003e\n\n\u003cp\u003eAfter flushing, the spent solvent contains removed oils and debris and must be disposed of in accordance with local, state, and federal environmental regulations. Follow shop hazardous-waste procedures: collect spent fluid, label containers, and arrange disposal through approved waste-handling channels.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCollect and contain used solvent and debris immediately after service\u003c\/li\u003e\n  \u003cli\u003eLabel waste and follow applicable hazardous-waste rules for disposal\u003c\/li\u003e\n  \u003cli\u003eDo not release into drains or the environment; use authorized waste handlers\u003c\/li\u003e\n  \u003cli\u003eObserve any regional warnings such as Proposition 65 where applicable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Mastercool 91049-32 is targeted at professional automotive and HVAC\/R technicians, service shops, and fleet maintenance teams who need a dependable, quick-drying solvent to prepare systems for repair or recharge. It suits technicians who already use or plan to use Mastercool flush hardware and who follow regulatory disposal and safety procedures.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I flush compressors or filter driers with this solvent?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Do not flush compressors, expansion valves, or filter driers. Use only on accessible lines, condensers, evaporators, and hoses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the solvent safe on O-rings and seals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The formula is formulated to be O-ring safe and non-corrosive, but always verify seals after use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":48086298362014,"sku":"B00RVZ6MDG","price":44.83,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mastercool-91049-32-front-label.jpg?v=1785894334","url":"https:\/\/northtrailauto.ca\/products\/mastercool-a-c-flush-solvent-32-oz-fast-evaporating-o-ring-safe-non-flammable-cleaner","provider":"North Trail Auto","version":"1.0","type":"link"}