Concentrate

We use this on our diesel engines and our AC units on our catamaran. It definitely does the job and is much rather use this than straight acid like you read on boat groups. We’ve used it for years and our engines and AC units run clean and cool.

I was concerned about the loss of water flow while using the Air on my boat. turns out there was such a large build up from being a salt water boat. barnacles, sand, dirt, shells. After using it, we noticed a significant increase in water outflow. It was amazing!!!!!!!!!! And also, the air conditioner was cooler to the touch, I guess it wasn't running so hard anymore!!! Love this stuff. Wish I took a picture of what came out of the lines.

Did not work for barnacles on external surfaces. 2 to 1 mix with water applied and reapplied 4 times no effect at all. Perhaps it works inside engine cooling passages if circulated for several hours but forget external use. Save your money and use it to buy a few wire brushes and scrapers with change for lunch.

This is a great product. eliminates hours of disassembly,

Did a little or nothing on left over barnacle

Tried at suggested mix and had poor results, but when used full strength it worked great. i suggest you try recommended before going full strength.

I used it to keep my boat a/c clear , the lines still had jellyfish in them . Will not buy again.

New bottom paint requirements in Washington totally stink. I had new bottom paint on my boat and pulled it out of the water after 3 months and my boat hull was covered with barnacles. I put this stuff in sprayer, sprayed the barnacles, they foamed and I was able to blast them off in stages with a pressure washer. I had to reapply to get them finally off. What didn't come off with pressure washer came off with scotchbrite. When I could get the barnacles off, the feet foamed off with repeated application (2X) of Barnacle Buster.