IRONTITE Thoro-Flush Coolant System Cleaner 16oz Powder — Concentrated, Removes Rust, Scale & Gelled Dex‑Cool

IRONTITE Thoro-Flush is a concentrated 16 oz powder that breaks down rust, scale, oil, sludge and gelled Dex‑Cool to restore coolant flow and clear clogged cooling passages.

Thoro-Flush is a concentrated coolant system cleaner formulated for mechanics and DIY technicians who need a fast, effective way to remove deposits that restrict coolant circulation. The powder dissolves buildups without aggressive mechanical action and is safe for common cooling system materials. One 16 oz bottle treats systems up to 6 gallons, making it suitable for most passenger cars, trucks and light commercial vehicles.

How does Thoro-Flush remove gelled Dex‑Cool and other deposits?

The specialized formulation targets the polymerized gels and oily residues that standard flushes often leave behind. Chemical agents in the powder disperse and solubilize sludge and gelled coolant so they can be rinsed from the system during a standard flush. Thoro-Flush does not rely on strong abrasives, reducing risk to components.

• Breaks down gelled Dex‑Cool and polymerized coolant deposits.
• Emulsifies oil and grease trapped in the cooling passages.
• Dissolves rust and mineral scale to free blocked heater cores and radiators.

Will Thoro-Flush harm cast iron, aluminum, brass or plastic parts?

Thoro-Flush was developed to be compatible with the metals and plastics commonly used in cooling systems. When used according to directions it cleans without etching or weakening metal surfaces and is safe for radiator tanks, hoses and heater cores. Avoid extended soak times beyond the recommended period to protect seals and nonmetal components.

• Safe on cast iron engine blocks and aluminum cylinder heads.