WS-1P Radiator Stop Leak Sealer is formulated to quickly locate and seal leaks in radiators, heater cores, cylinder heads, engine blocks, and freeze plugs. Compatible with all types of antifreeze and coolant, this aluminum powder-based formula prevents cooling system damage and lubricates water pumps, offering a safe and effective repair solution. Trusted by professional technicians, it is safe for all metal, plastic, and rubber components.

Specifications & Features

• Each tube contains 20 grams (0.7 oz) of radiator stop leak sealer
• Formulated with aluminum powder for enhanced sealing performance
• Compatible with all antifreeze and coolant types
• Safe for use on metal, plastic, and rubber cooling system parts
• Helps prevent and repair cooling system damage
• Lubricates water pumps and inhibits rust formation
• Stops radiator leaks safely and effectively
• Made in the USA

Interchange Part Numbers

• ASBPI12
• WS-1P
• WS1P
• 52SM
• 52-SM

Usage Directions

1. Ensure engine is off and completely cooled before opening radiator cap.
2. Turn heater control to full hot position.
3. Pour the full contents of one tube directly into the radiator.
4. Top off coolant level if necessary.
5. Replace the radiator cap securely.
6. Drive the vehicle to circulate the solution and seal any leaks.