STAR BRITE Star-Cool Premium Synthetic PG Engine Coolant 64 oz — Pre-Mixed Antifreeze, Corrosion Protection

STAR BRITE Star-Cool Premium Synthetic PG Engine Coolant is a ready-to-use, propylene-glycol based antifreeze and corrosion-inhibiting coolant engineered to protect water-cooled gasoline and diesel engines year-round.

Star-Cool blends advanced poly organic additive technology with a propylene glycol base to deliver long-lasting protection, improved thermal stability, and leak-sealing benefits without requiring on-site dilution. Formulated for engines that demand dependable temperature control and corrosion resistance, this 64-ounce pre-mixed solution is designed to simplify maintenance while meeting or exceeding OEM and ASTM standards.

How does Star-Cool help engines run cooler and more reliably?

Star-Cool’s proprietary additive package stabilizes heat transfer and helps maintain optimal operating temperature, which supports performance and efficiency under load. Its formula reduces scale and deposits that can insulate hot spots, preserving cooling system flow and radiator effectiveness.

• Advanced POAT and PCT additives for consistent thermal performance
• Limits scale and deposits that impede heat transfer
• Pre-mixed with de-ionized water for immediate use—no field dilution

Will this coolant protect against corrosion and leaks?

Yes—Star-Cool is engineered to guard metals in cooling systems from corrosion while also helping seal pinhole leaks and small cracks. The product’s corrosion inhibitors create a protective film, extending component life and reducing the risk of coolant loss between service intervals.

• POAT chemistry provides multi-metal corrosion protection
• Seals minor pinhole leaks and hairline fissures
• Surpasses OEM rust-and-corrosion benchmarks for extended service

Is Star-Cool suitable for both gasoline and diesel applications?

Star-Cool is compatible with a wide range of water-cooled gasoline and diesel engines, including high-performance powerplants. Its propylene glycol base and biodegradable components reduce clogging risk and maintain flow characteristics across different engine types.

• Safe for gasoline and diesel cooling systems
• Propylene glycol formulation reduces environmental toxicity concerns
• Works as a top-off or for complete flush-and-fill procedures

How do I install Star-Cool and what service life can I expect?

Installation is straightforward: flush the system, close drains, and fill with Star-Cool—do not add extra water. After a brief run to purge air, verify the level and reseal; the formula is designed for up to 2+ years of protection depending on service conditions.

• Pre-mixed—use directly from the bottle, no dilution required
• Flush system and fill following manufacturer guidance; run engine to release trapped air
• Provides extended protection, often exceeding typical OEM service intervals

Who is this for: Star-Cool is aimed at vehicle owners, fleet managers, and marine or RV operators who need a trustworthy, ready-to-use coolant that balances safety, longevity, and performance. It’s especially useful for those who want a biodegradable, propylene-glycol based solution that minimizes maintenance hassle while protecting both older and modern engines from corrosion, overheating, and minor leaks.

Directions summary: do not remove a hot radiator cap; consult the engine service manual for full flushing and filling procedures; flush system completely, close drains, fill with Star-Cool only, run engine 5–10 minutes to purge air, top as needed, then replace cap and inspect for leaks.