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

I’m pretty anal about keeping my 18’ white and teal fiberglass flats boat clean and maintained. But over time it started developing a below-the-waterline stain that just didn’t come off with normal cleaning. I was dreading a lot of upcoming elbow grease to get it off.I started researching the best solution, came across recommendations for StarBrite Hull Cleaner, and ordered a bottle. As per instructions, all I did was spray, let it sit for a few minutes, then rinse off with a hose. I did use a cleaning mitten to help spread the cleaner evenly, but NO scrubbing was involved. There were a few stubborn areas that I had to treat a second time, but again, no scrubbing. After the second treatment the results were amazing! And so easy! There was no discoloration on the teal portion, and no damage to decals. I did not use gloves, and had no issues with my hands. I would recommend eye protection as it stings your eyes.One bottle was more than enough for my boat. I accidentally sprayed some on the inside bottom of an old stained cooler and it came out shiny white, so it’s got me thinking about other possible uses for this product.I highly recommend StarBrite Hull Cleaner. I haven’t yet cleaned the rear bottom hull (the part that’s so inaccessible while on the trailer), but it’s bugging the crap out of me because the difference is so dramatic!

Why did you pick this product vs others?:Awesome. Ate the brown stains on contact! I spent hours before this scrubbing. This product took care of it on contact!

I purchased a new to me 2001 Bayliner Trophy 2052 in early June 2025. The boat's gelcoat is in moderate condition, meaning: There's still a little bit of shine to it, but it is just beginning to dull all over. The bow (front 1/2 of the hull) from the waterline down had a pretty good "braw" which is the typical orange discoloration that gelcoat acquires from sitting in salt water over the years. This product worked excellent! in removing this discoloration and with minimal effort. It did take 2 application as mine was getting pretty bad, but I was amazed of how well it worked. Front braw eliminated! I would definitely recommend this product to family and friends, and I will buy again.

The hull of my boat was a discolored reddish, brown color. I tried several different products on it including a 5000 PSI Steam Pressure washer, nothing worked. STAR BRITE Instant Hull Cleaner did the trick. I was amazed. It was not easy, I had to scrub with a lot of elbow grease. But it did remove the stain.... The stain had been on the boat all winter. So, if you used it right after getting out of the water it might not take as much effort. Great product, I will buy it again.

Amazing !!!!! My daughter recently bought a home that the previous owners apparently didn’t take care of or know how too. I used to own a boat and the first thing that came to mind on cleaning fiberglass was this product. It did take a little elbow grease because of how bad it was but maybe like a half hour of cleaning and looks like new. Definitely has a strong smell so use a mask and have proper ventilation. Will be keeping a bottle for future use under the cabinet.

Works fast. No scrub. Spray on and wait 5 min. Rinse off.

Used this to clean the Hull that was very dirty and with a rag it cleaned very easy with this spray. Good Overall product.

Hull cleaner didn’t clean oxide off jel-coatI had to use a fiberglass cleaner