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  • Writer's pictureCorey

Archoil AR5100 Rust Remover

AR5100 is an industrial-grade pH neutral (not acidic) rust and oxidation remover that quickly and effectively removes even the heaviest corrosion from metals. AR5100 is highly concentrated and must be mixed with 15 parts of water to activate.

Features & Benefits

  • Works on ferrous and non-ferrous metals

  • Brightens copper and other copper-based alloys

  • Fast-acting (Results in as little as 15 minutes)

  • Non-flammable and non-toxic

  • Re-use many times before chemistry depletes

Removes Even the Heaviest Corrosion

Use AR5100 to remove rust from auto parts, tools and more. AR5100 is a great product to use to restore corroded fuel tanks and radiators, for example. Use it on steel, iron, brass, copper, chrome and other metals and alloys to remove rust surfaces while leaving most other materials - (plastic, rubber, paint etc.) unharmed.


AR5100 gets to work in as little as 30 minutes. Upon exposure, you will very quickly see oxidation falling off the surface of the rusted item.

Remove Rust Instead of Converting It

AR5100 is not a rust converter; AR5100 completely removes rust from corroded metal, leaving a surface ready to prepare for painting or welding.

Easy to Work With

AR5100 is PH neutral (non-acidic) and non-toxic solution that you can reuse many times before its chemistry depletes. It will not harm most plastics, rubbers and paints (test on a concealed surface before use).

Metal Oxides Pulled From the Surface

AR5100 works through a process called chelation in which a large synthetic molecule forms a strong bond with metal oxides (rust) but not with the host metal, pulling the rust from the surface.

Important Notes:

  • AR5100 will work at temperatures between 18°C and 70°C (65°F and 160°F). If the solution is too cold, it will not be effective.

  • AR5100 will remove bluing and galvanization.

  • AR5100 will change the finish on high carbon steel to a dark patina.

  • Store any mixed solution of AR5100 in stainless steel containers or other corrosion-resistant materials.

Treat Rate

  • Dilute with water up to 1:15 (1 part AR5100 + 15 parts water)

  • Immerse item in diluted solution and let soak until all oxidation is removed.

  • AR5100 can operate from 18°C and 70°C (65°F and 160°F) but works faster at temperatures above 50°C (120°F). Increasing the temperature decreases the amount of time to remove oxidation, especially on heavily rusted metals.

  • Let soak for between 1-8 hours.


Step 1: Mix 1 part of AR5100 with 15 parts water. You can add 235 ml (8 oz) of AR5100 concentrate to a 3.78 litre (1-gallon) container and fill the rest with water to create a 15:1 solution. Use hot water 50°C (120F+) or higher to decrease the time needed to remove oxidation. You must mix AR5100 with water to activate the chemistry. Mixing AR5100 with less than 15 parts water will not make it more effective.

Step 2: Immerse the item in AR5100 solution until all oxidation is removed. You may also add AR5100 to pressure washers. The product will change colour as it removes rust from the item; this does not mean the solution is spent. You can reuse the AR5100 solution many times until it is no longer effective.

IMPORTANT: AR5100 will leave behind a dark patina on some metals; this surface is not rust and is ready to prepare for painting or welding.

Available Sizes

  • 16 oz / 473 ml bottle

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