BG PRODUCTS Universal Cooling System Sealer — concentrated leak sealer for radiators & hoses, prevents overheating

BG Universal Cooling System Sealer immediately seals small cooling-system leaks and helps reduce overheating while extending the life of radiator and heater components.

This concentrated formula from BG PRODUCTS is designed for quick, simple addition to your vehicle's cooling system. It mixes with coolant to locate and seal common leaks in radiators, hoses, heater cores and freeze plugs without disassembly. Use it as a preventative maintenance step or a temporary fix to keep a car on the road while planning a permanent repair. Always follow label instructions and take care with handling and disposal due to regulatory safety notices.

How does this sealer fix leaks without removing parts?

The product contains engineered particles that travel with the coolant and accumulate at leak points when exposed to air or a pressure drop. Once there, the particles form a flexible plug that bonds to metal and rubber surfaces, closing hairline cracks and small pinholes. This process happens while the engine runs, letting you repair many leaks without taking hoses or the radiator apart.

• Forms plugs at the source of coolant exposure
• Works on metal and rubber components
• Applies without draining or dismantling the cooling system
• Compatible with a wide range of passenger vehicles

Will it help stop my engine from overheating?

By sealing leaks that cause coolant loss and air entry, the sealer helps maintain proper coolant volume and pressure, which supports steady operating temperatures. It can reduce or eliminate overheating triggered by slow leaks or gradual coolant loss. However, it is not a cure for failed water pumps, blocked passages, or significant mechanical damage.

• Prevents coolant loss that leads to overheating
• Stabilizes system pressure to improve circulation
• Not a replacement for mechanical repairs like pump or thermostat replacement

How do I use BG Universal Cooling System Sealer safely and effectively?

Shake the bottle, add the recommended dose directly into the radiator or coolant reservoir while the engine is cool, then run the engine to circulate the product. Follow the dosage instructions on the label for your vehicle’s cooling capacity. After treatment, monitor coolant level and temperature; repeat dosing is usually unnecessary unless specified.

• Add product only when engine is cold
• Use the correct amount for system size per label directions
• Run the engine briefly to circulate and allow sealing
• Check for leaks and coolant level after treatment

Important safety note: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For details, see www.P65Warnings.ca.gov.

Who is this for: BG Universal Cooling System Sealer is made for drivers, fleet managers and DIY mechanics who need a fast, low-effort way to stop small coolant leaks and reduce overheating risk between permanent repairs. It’s ideal for routine preventative maintenance, temporary roadside fixes, or for older vehicles where full component replacement is being deferred. Do not use as a substitute for major mechanical repairs; consult a technician if the problem persists or if your vehicle shows severe overheating symptoms.