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)

This stuff is incredible! We have our boat docked in a lake with tannin stained water every year, which leaves a very unsightly brown waterline around the hull. I have tried everything to remove it and endured lots of pain from fruitless scrubbing. Nothing worked. Needless to say, I was very skeptical of this product. Literally sprayed it all along the scum line, let sit for a few minutes and hosed off. Poof- GONE! All without damaging the paint or stickers. followed up with a quick wash and towel off wax - our boat looks brand new at 22 years old!

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.!

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

Works but needs tons of scrubbing and have to keep on spraying it worth the $ if you have the time to work on it

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!

Freaking amazing! I had my boat on the water for a week while fixing my boat lift, knowing the lake water scum was going to be bad on the hull. I thought I was going to have to pay a ton of money for professional detailing. After putting the boat back on the lift, the hull was covered in yellow-brown scum. I tried many different chemicals to remove it, but nothing worked.I decided to give Star Brite a try, fully expecting it to fail like all the other cleaning agents I bought. I was amazed! Using just a rag, the Star Brite Instant Hull Cleaner took the brown and yellow stains right off with ease. I love it and recommend it 100%!"

Sprayed on and waited 2 min, results were mild hard water came off.Scrubbed 2 min straight with a hard bristle brush, results were better.Scrubbed second time, no scum line removal, or heavy deposits removed.This is an incredibly mild product, and i had better results from concentrated vinegar.3 Star for the gel application allowing for more even distribution, would not recommend at all for hard water deposits or scum line removal.

Well you lucky boat owners! But I used this on my fiberglass shower. Very pleased. Saved a lot of scrubbing.