How many bottles does it take to flush a four cylinder system?

Based upon my experience, ONE bottle is more than enough.

Is it safe for aluminum radiators? Their website doesn't say.

I have used it in aluminum radiators a lot If the radiator is in bad shape it might leak This is a great product here

What are the disposal instructions on this product?

Just recycle ♻️ at recycling center

Can you use this for boats?

I don't own a "ship" but sure has hell my "boat" has a water to water heat ex-changer that gets strangled by salt and mineral deposits on the lake/sea side, that require a nice acid boil to clean out. The closed loop with coolant in it gets flushed every two years. I would not trust much of what you say about "boats".

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🔥 Flush the old, fuel the bold! Keep your engine cool and your ride unstoppable.

DEEP CLEAN POWER - Concentrated formula flushes rust, scale & grime for peak cooling system health.
OVERHEAT DEFENSE - Effectively removes deposits that cause overheating, protecting your engine’s performance.
LONGEVITY BOOSTER - Extends the lifespan of your vehicle’s cooling system, saving you money on repairs.
PERFORMANCE RESTORER - Restores coolant flow efficiency to keep your engine running smoothly under pressure.
EASY MAINTENANCE UPGRADE - Simple 32 oz treatment that fits seamlessly into your regular vehicle care routine.

BlueDevil Radiator Flush is a powerful 32 oz concentrated formula designed to deep clean your vehicle’s cooling system by removing rust, scale, and grime. It prevents overheating, restores coolant efficiency, and extends the life of your radiator and engine components, making it an essential maintenance step for any proactive vehicle owner.

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Manufacturer	BlueDevil Products
Brand	BlueDevil Products
Model	00204
Item Weight	2.4 pounds
Product Dimensions	5 x 2 x 8.5 inches
Item model number	00204
Manufacturer Part Number	00204

BlueDevil Radiator Flush – 32 oz | Deep Cleaning Coolant System Flush | Removes Rust, Scale & Grime

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