F9 BARC Rust Remover

F9 BARC (Battery Acid Restoration Cleaner) from Front 9: removes orange battery acid stains, rust and fertilizer stains from concrete and other surfaces, without scrubbing. For professional contractor purchase only.

For professional contractor purchase only. Please use proper PPE when using any chemical. Do not use on glass.

F9 BARC is formulated to remove both battery acid staining and rust stains, across the whole rust family: thin, thick, topical, embedded and fertilizer stains. It is easy to apply and does not require scrubbing, brushing or elbow grease. According to Front 9, BARC chemically locks into the concrete, reversing 80 to 100% of the orange staining and restoring it to its natural gray color.

Front 9 points out that many rust removers use acids that eat the cement paste, etching the surface and sometimes turning it white or even more orange. BARC is made to remove the stain without that kind of damage.

Know Your Stain

• Rust: Comes mainly from metals or fertilizers that contain iron. Most concrete rust does not go more than 1/16" deep.
• Orange battery acid: An orange flash acid “burn” that can run down a driveway and into the street. It looks almost identical to rust but is very different. BARC removes it.
• White battery acid: Can travel through the entire slab. Unfortunately, no cleaner can remove a white battery acid stain.

Dilution by Surface

Spray at a rate of 400 to 800 sq ft per gallon. Always apply with a pump-up sprayer or the F9 hand-carry electric applicator, and always do a test spot first.

• Porous (concrete, bricks, pavers): 1 part water to 2 parts F9 BARC. On these surfaces, BARC needs to dry into the concrete and lock in.
• Semi-porous (stucco, plastic, vinyl, asphalt, stone): 1:1 to 2:1 water to BARC. Do not let it dry; rinse as soon as the stain disappears.
• Non-porous (sealed concrete, concrete coatings, clay pavers, tile, painted metal, unpolished aluminum, stainless steel, interior pools): 2 parts water to 1 part BARC. Light brushing with a soft or medium truck brush may be needed. Do not let it dry; rinse right after the stain disappears.

How to Remove Rust and Battery Acid Stains From Concrete

1. Pre-clean. Pressure wash the concrete with a commercial pressure washer, degreaser and surface cleaner (an alkaline concrete cleaner works too), then rinse well. This opens the pores so BARC soaks in deeper.
2. Let the concrete dry completely.
3. Apply. Mix 1 part water to 2 parts BARC and apply liberally and evenly to the entire pad with a pump-up sprayer, from control joint to control joint. Don't spot spray on the first pass. Use a circular, overlapping motion at 60 to 70 PSI, putting a bit more on heavier stains. If it runs, leave it alone. BARC should start to turn white and foam slightly.
4. Let it dry. Stains disappear as the concrete dries.
5. Second pass if needed. If spots remain, apply again, lighter this time and heavier only where stains remain. Mist spraying is fine on this pass. Let it dry again.
6. Finish. The reaction leaves light and dark mineral salts. Wet the concrete to reactivate BARC, lightly broom it while wet, then rinse lightly with a pressure washer (not a surface cleaner). Let it dry completely and evaluate.

Rust removal is an art and a science. Professional applicators can download the F9 Cookbook app for more instructions and processes.

Safety Data Sheet

Read the F9 BARC Safety Data Sheet before use.

Specifications

• Brand: Front 9 (F9)
• Removes: Rust, fertilizer stains, and orange battery acid stains, plus rust from irrigation and HVAC systems
• Works on: Concrete, bricks, pavers, tile, stone, stucco, asphalt, vinyl, siding, shingles, rubber and more
• Do not use on: Glass
• Properties: Biodegradable, non-abrasive, non-flammable
• Coverage: 400 to 800 sq ft per gallon
• Size: 1 gallon
• Sold to: Professional contractors only

Shelf Life of F9 Products

Brand new and unopened. Once opened, cut these numbers roughly in half.

• F9 BARC: 5 years
• F9 Double Eagle: 5 years
• F9 Efflo: 2 years
• F9 Groundskeeper: 2 years

Learn From Doug

Starting a pressure washing business? The Online Pressure Washing School will help you drastically cut your learning curve, and my YouTube channel has free pressure washing tips and tricks. Questions about this product? Use our contact form and I will be glad to help.