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Your cart is empty.Mixing and Coverage: One gallon of F9 BARC concentrate makes 1.5 to 3 gallons of cleaner, suitable for 400-800 square feet of concrete. Always mix with clean water before use. Usage Restrictions: Only F9 Authorized Applicators, Contractors, or Maintenance Departments may use F9 BARC. Users agree to these terms upon purchase. Safety and Application: Do not use on glass. Safe for concrete, bricks, pavers, tile, asphalt, and concrete coatings. It is biodegradable, non-abrasive, non-flammable, and safer than hydrochloric acid. Performance: Effectively removes orange battery acid burns, rust, and fertilizer stains, restoring concrete to its natural bright gray color. The product is durable, does not require mixing, brushing, or messy pastes, and maintains its strength over time.
Bob and Diane
Reviewed in the United States on March 7, 2025
We have previously used the F9 BARC cleaner to remove rust and other stains from our concrete porch. The results have always been very good and better than other products we have tried. The cleaner is easy to use and mixes readily with water.
Customer
Reviewed in the United States on September 23, 2024
Used F9 on my roof shingles, they were stained from the A/C unit for many years. Two applications were needed, but it was a bad stain. Thank you for all the customers who stated how great this product was.
Chan
Reviewed in the United States on September 14, 2024
We use this product to remove rust colored stain from battery acid. We followed directions found online on how to properly apply this product. When we put the stain remover on the stain, we allowed it to dry completely before rinsing it off and it completely removed the stain. I have attached before and after photos.
LAUREN D SMITH
Reviewed in the United States on August 21, 2024
Read all the reviews, watched all the videos, followed instructions completely. Don't believe the coverage for one gallon. instructions state to apply liberally with hand sprayer. I applied moderately and was out of product in 140 sq ft. It lightened the stains by about 20%. My slab is 240 sq. I'm sure it would be good for rust stains but useless for deep fertilizer stains. At $50 a gallon to apply 2 coats it will cost me $200 and I don't believe it will remove the stains to a satisfactory level. $15-20 a gallon and I wouldn't have written this review. I will add photo's.
Laura Cattell
Reviewed in the United States on August 17, 2024
Used this product today. I went from having very large and dark rust and battery acid stains from my golf cart to a very white, clean driveway. I’ve had professionals power wash my house and driveway before and although they did get some of the stains out, they still remained, only faded. I highly recommend this product. WOW just WOW.
Patte C
Reviewed in the United States on October 29, 2024
Our golf cart batteries leaked to concrete, we over-watered the distilled. HOA not happy with that!! One bottle worked on the area affected. We were impressed. However after Hurricane Milton, it caused a huge stain somehow. Not inexpensive but IT WORKED. We will order again to clean the new stain. Highly recommend.
Hans Gruber
Reviewed in the United States on October 2, 2024
I’ve tried everything on the market to try and get 24 years of dirt, grime and rust off my stucco. I forgot to take before and after pics of my other stubborn stains on stucco below other windows. These pics are just after one spraying on a lighter stain. All my stains disappeared completely after the second spraying. Works great on stubborn rust stains on my concrete driveway. I am so happy I found F9 Barc on Amazon. I am very happy with the results and this product is well worth the price.
Ron Baker Sr
Reviewed in the United States on October 19, 2024
Works very well on Pontoon Boat pontoons after season, getting all the water mosses ets.
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