This stuff removed stains from our boat's hull that had built up over 2 seasons. Highly recommend!

A friend referred me to bio-kleen. I was discussing a scale buildup on my boat that happened after 2 nights in fresh water. Told him FSR would barely budge the build up.

this is a great product and works as stated. you need to let it stand on for about 5 minutes and then rinse. this is the fiberglass cleaner and it works on ALUMINUM. the aluminum cleaner , which I have purchased also works great but doesn't foam as much and runs off quickly. both are great !! a little pricey but its up to you how often you use it. give me a deal and ill buy more .

I had a years worth of water spots on a brand new boat, I was having no luck getting them off with other products. This product was a dream come true... sprayed it on, wiped the spots off without any scrubbing. After the microfiber towel was damp with this product, I didn't even need to spray anymore. The spots just wiped off! I'm so thrilled with this product, I will recommend it to anyone. So thankful a friend told me about it. Thank you for bringing my boat hull back to showroom shine.

Purchased biokleen based on a flyer I picked up at a marina. Was skeptical, but for nine bucks I figured what the heck, nothing else was able to remove the yellow water stain around my hull. This stuff is amazing. Water line is gone, no scrubbing, just apply, wait and rinse.