I would recommend this to anyone trying to get those tough yellow hard water stains. I tried other hull cleaners with no results,tried CLR and acid based products. This product is great! The hard water stains had been on this boat for 2 years. I sprayed it on, waited 10 minutes,and the stains wiped off like butter.Just wipe it dry or rinse it off,then go over it with a spray wax and it looks new again.

I called to get a cleaner for my aluminum fuel tank that had been in a flood and had oxidation on the interior. There was no way to physically clean the interior as there was limited access and had baffles inside. I had thought that the aluminum cleaner would work best, but the people at bio-kleen suggest the fiberglass hull cleaner would work best.

I used It diluted as they suggested, and sloshed it around and then let it set for about

30 minutes. Then rinsed it out. Upon inspection, most of the oxidation was gone and there was a fresh line where the cleaner had sat in the tank. One more application and all the oxidation was gone ! Fuel tank is back in my car and the car is running again without any fouling.

I have also used this to soak and clean some SDS drill bits that had been flooded and were so rusted I was about to throw them away. I soaked them in a strong solution and wire brushed them. I let them sit over night and the next day they looked almost like new.

I have been using the remaining product for cleaning a host of things and am always amazed at how good it works.

This is truly an amazing product.

This product is amazing to say the least!!!! Hands down better than anything I've used in the past. Great price and friendly customer service. Deserves 10 stars!

I applied the Bio Kleen product to the boat’s hull shortly after being pulled from the water. The first round was applied at full strength the second was diluted for touch up applications. I have to say with little agitation the hull game out absolutely perfect and that is really saying something as the boat sat in the water the entire summer.

Thank you for a great product.

Worked better than expected. Cleaned my outdrive with this and it melted the grime and growth off of it. Worked best with a soft brush and gentle scrubbing. Very satisfied.