atp automotive AT-205 Re-Seal Rubber Seal Rejuvenator 8 oz — Stops Engine, Transmission & Power Steering Leaks

AT-205 Re-Seal is a professional-strength, rubber seal rejuvenator that quickly stops leaks in engines, transmissions, power steering and hydraulic systems without harming internal components.

Designed by ATP Automotive, this concentrated 8-ounce formula restores flexibility to hardened or dried-out rubber seals and gaskets so they swell back to shape and reseal leaking connections. The non-petroleum-distillate chemistry is compatible with conventional and synthetic lubricants, automatic transmission fluid, power steering fluid, gear oil and hydraulic oil. It works by conditioning and softening rubber rather than adding bulk, helping you avoid over-swelling while protecting bearings and internal parts.

How does AT-205 stop leaks without damaging internal parts?

AT-205 uses a seal-conditioning formula that penetrates and rejuvenates rubber and elastomer materials instead of dissolving or breaking them down. Because it contains no petroleum distillates, it won’t degrade seals or create harmful residues within the lubrication circuit.

• Conditions rubber to restore flexibility and shape
• Non-petroleum base avoids harmful residues
• Safe for metal bearings and internal components
• Works with a wide range of lubricants and fluids

When should I use this 8-ounce bottle of AT-205?

Use the 8 oz bottle for light to moderate leaks, spot treatments, or as a trial before treating an entire system. It’s ideal for older vehicles with marginal seals or for topping up systems showing slow seepage from gaskets, shaft seals, or O-rings.

• Perfect for spot repairs and small systems
• Good as a maintenance treatment to prevent future leaks
• Suitable for cars, trucks, motorcycles, and small equipment
• Works for engine, transmission, power steering, and hydraulic leaks

How do I apply AT-205 Re-Seal safely and effectively?

Application is straightforward: add the recommended amount to the affected fluid reservoir, run the system to circulate, and allow time for the product to condition seals. Observe the leak area over short trips to confirm improvement before considering additional treatment.

• Follow label dosage for the specific system size
• Pour into the fluid reservoir or sump with the engine off
• Run vehicle or equipment briefly to circulate product
• Re-check seals after normal operation and repeat if needed

Who is this for? AT-205 Re-Seal 8 oz is aimed at DIY mechanics, professional service shops, and fleet managers who need a targeted, reliable remedy for rubber-seal leaks without replacing parts immediately. It’s especially useful for older vehicles, equipment with aged seals, and anyone wanting a fast, low-cost alternative to disassembly or expensive repairs. Keep an 8-ounce bottle on hand for spot fixes or as a first-line treatment to extend the service life of seals and gaskets while protecting internal components.