Zerex G48 Concentrate Antifreeze/Coolant

Per the front label and back label, G48 is formulated for BMW (all models), Mercedes-Benz, MINI (all models), Tesla (all models), and Volvo (all models). The back label also lists Audi, Smart, and Rolls-Royce, along with OEM spec codes including VW TL 774-C (older G48 spec), MB 325.0, Cummins 9010-4, Detroit Diesel 792000, GM 1825M/1899M, MAN 324 NF, and others. Always verify against your vehicle's owner's manual before switching coolants.

G48 is an industry shorthand for a low-silicate, phosphate-free, nitrite-free HOAT (Hybrid Organic Acid Technology) formulation originally spec'd by Volkswagen (VW TL 774-C). Zerex G48 is specifically an Si-OAT variant · organic acid technology with a small amount of silicate for rapid initial aluminum protection. This differs from Zerex G05 (low-silicate HOAT for Ford/Chrysler applications), Zerex Asian Vehicle (phosphate-based HOAT for Honda/Toyota), and Zerex Original Green (older silicate IAT formula). Using the wrong inhibitor package for your vehicle can cause corrosion or seal degradation.

Yes · this is a full-strength concentrate. Per the label: mix 50/50 with distilled water for −34°F / +265°F protection; 60/40 for colder freeze protection; 70/30 for −84°F / +276°F. Do not use undiluted in the cooling system · ethylene glycol concentrate has a higher freezing point than a 50/50 mix. Use distilled water, not tap water, to avoid mineral deposits in the cooling system.

The DANGER classification is driven by disodium tetraborate anhydrous (a borate compound at approximately 0.77% in the formula), which carries an H360 reproductive toxicity classification (Cat 1B · may damage fertility or the unborn child). The ethylene glycol base itself is H302 (harmful if swallowed, Cat 4) · a WARNING-level code. The H360 borate classification escalates the signal word to DANGER. The primary exposure concern is ingestion; normal flush-and-fill skin contact does not carry the same classification pathway. Pregnant individuals or those planning pregnancy should review SDS Section 8 precautions.

The SDS §2 classifies this product as H302 (harmful if swallowed, Cat 4 acute oral toxicity) and H360 (may damage fertility or the unborn child · borate inhibitor). Ethylene glycol has a documented sweet taste that attracts pets and small children. Unlike some other Zerex formulas (such as G05), G48 does not include denatonium benzoate as a bittering deterrent · no bittering agent was confirmed in the SDS §3 or the Amazon feature bullets. Store out of reach of pets and children; do not leave spent coolant in drip pans or puddles.

Collect spent coolant in a sealed container · do not drain to the ground, storm sewer, or household drain. Ethylene glycol is attractive to animals due to its sweet taste and is harmful if ingested. Most auto parts stores (AutoZone, O'Reilly, Advance Auto Parts) accept used coolant for recycling at no charge. Check your local store's policy before arrival.