atp automotive AT-205 Re-Seal Rubber Seal Restorer, 8 oz Bottle — Stops Oil & Fluid Leaks Fast

AT-205 Re‑Seal is a professional-strength liquid that restores hardened rubber seals and gaskets to stop leaks quickly without harming internal components.

Designed for cars, trucks and heavy equipment, this 8 ounce bottle contains a concentrated formula that rejuvenates and softens worn or dried-out rubber components. It works with engine oil, automatic transmission fluid, gear oils, power steering fluid and hydraulic oil, and is free of petroleum distillates so it refreshes seals without over-swelling or degrading them. The product is safe for use around bearings and other internal parts when added according to instructions.

How does AT-205 Re‑Seal stop leaks so fast?

The formula penetrates and refreshes rubber polymers, allowing seals and gaskets to regain flexibility and sealing ability. Rather than simply bulking up the surface, it conditions the material so it conforms again to mating surfaces and prevents fluid escape.

• Deep-conditioning agents that soften hardened rubber
• Works while the system is in normal operation—no disassembly required
• Concentrated 8 oz bottle treats specified oil volumes for targeted repairs

Will it damage bearings or other internal parts?

AT-205 Re‑Seal was formulated for compatibility with internal components and lubricants, so it does not harm bearings or hydraulic parts when used as directed. It avoids petroleum distillates and aggressive solvents that can strip protective films.

• Safe with conventional and synthetic oils
• Compatible with ATF, gear oil, power steering and hydraulic fluids
• Non-corrosive to metal surfaces when mixed into the system

What types of leaks and systems can this treat?

This product targets leaks caused by dried, shrunken or hardened rubber seals and gaskets across multiple systems. It’s commonly used for engine oil leaks, transmission seepage, power steering weeps and hydraulic soft-seal leakage.

• Engine valveseal and oil pan gasket rejuvenation
• Automatic transmission and transfer case seal refresh
• Power steering rack and hose-end seal conditioning

How do I use the 8 oz bottle effectively?

Pour the recommended amount into the system fluid per the label and run the vehicle or equipment to circulate the product. Allow time for the formula to work into the rubber; small seepage often stops within hours, while severely hardened seals may take longer.

• Add to warm oil or fluid for faster penetration
• Follow dosage instructions based on reservoir capacity
• Re-inspect seals after a short operating period and repeat if necessary

Who is this for: ATP Automotive AT‑205 Re‑Seal is ideal for mechanics, fleet managers, restoration shops and DIY enthusiasts who need a fast, non-invasive fix for leaking seals and gaskets. If you prefer repairing leaks without teardown, want a product compatible with multiple lubricant types, or need a concentrated solution that minimizes waste, this 8 ounce resealer is a practical addition to your maintenance supplies.