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Genuine GM (12378255) Fluid 3634621 Cooling System Seal Tablet - 4 Grams, (Pack of 5)
Genuine GM (12378255) Fluid 3634621 Cooling System Seal Tablet - 4 Grams, (Pack of 5)
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Original organic formula designed for use in radiator systems to seal leaks and prevent leaks due to casting porosity in engine components. Seals minor leaks and porosity in cooling systems. DEX-COOL compatible. Non-toxic.

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Product Review

Original organic formula designed for use in radiator systems to seal leaks and prevent leaks due to casting porosity in engine components. Seals minor leaks and porosity in cooling systems. DEX-COOL compatible. Non-toxic.

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