STAR BRITE Instant Hull Cleaner - 32 Oz Gel Spray - Easily Remove Stains, Scum Lines & Grime on Boat Hulls, Fiberglass, Plastic & Painted Surfaces - Easy to Use Formula (096132)

I was very skeptical at first, with how easy it said it’d be to use, just spray on and rinse off and the brown slime would be gone and boy was I wrong. Literally just spray it on wait a couple minutes and rinse off, took the brown slime right off. Amazing. One bottle did my 19ft boat with some left over. Every effective, no scrubbing, very easy to apply

I don’t even own a boat. What I do own is a shower that had a nasty floor that no amount of scrubbing with many various kinds of cleaners would ever come clean. It was an embarrassment to even have guests use this shower. I was extremely hesitant to order this because of the price and the fact that several reviewers said the spray bottle kept getting clogged. But desperate times call for desperate measures. What a bargain even if I have to buy a new spray bottle every time I use it. Two applications and a bit of scrubbing and my shower looks brand new. I have less than 10 minutes total time in cleaning this shower. So I can’t tell you how it works on a boat hall but I can tell you on a fiberglass shower, it is amazing.!

Great Hull Cleaner — Works Fast and Makes Boat Look New! We recently used this hull cleaner on our boat and were very impressed with how well it worked. This product quickly removed waterline stains, scum lines, rust marks, and general grime without a ton of effort — just spray it on, let it sit briefly, then rinse off. What We Liked: ✔️ Easy to use — no heavy scrubbing or elbow grease needed; it dissolves stains almost instantly. ✔️ Very effective on fiberglass and painted surfaces — even tough stains like brown water line marks and fish blood came off. ✔️ Quick results — made a noticeable difference in appearance in minutes. ✔️ Great prep before polishing or waxing. Notes: 💧 Make sure to follow instructions and rinse thoroughly after applying. 🧤 We used gloves since it’s pretty strong and works best when handled carefully. Overall this has been a great addition to our boat care routine — cleans deeply and saves a ton of time compared to scrubbing by hand. Would definitely recommend it if you want your hull looking sharp again!

My hull wasn’t extremely dirty however product did work well

Best product on the market. Easy to use . Removes all the water stains